restored folders and files have different ids than their originally added entities

In the "restore file1" step, you're only restoring the file itself, not the original folder. When adding or restoring a file, if a parent path component (the folder, in this case) doesn't already exist, it will be automatically created. That automatically created folder is a new folder, not a restored folder (and it may or may not be at the same path as the original parent folder, e.g., since you can restore a file to a different location).

As for the file ID of the restored file itself, I would expect that to be the same, and it is in my testing. Here's an example I just ran through:

curl -X POST https://api.dropboxapi.com/2/files/create_folder_v2 \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"path":"/test_691719_folder"}'

# {
#   "metadata": {
#     "name": "test_691719_folder",
#     "path_lower": "/test_691719_folder",
#     "path_display": "/test_691719_folder",
#     "id": "id:25N5ksooX-sAAAAAAAQyqA"
#   }
# }  

curl -X POST https://content.dropboxapi.com/2/files/upload \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/octet-stream' \
  --header 'Dropbox-API-Arg: {"path":"/test_691719_folder/test_691719_file"}' \
  --data-binary @'test.txt'

# {
#   "name": "test_691719_file",
#   "path_lower": "/test_691719_folder/test_691719_file",
#   "path_display": "/test_691719_folder/test_691719_file",
#   "id": "id:25N5ksooX-sAAAAAAAQyqQ",
#   "client_modified": "2023-06-14T18:42:28Z",
#   "server_modified": "2023-06-14T18:42:29Z",
#   "rev": "5fe1b50581a7c021eccc7",
#   "size": 27,
#   "is_downloadable": true,
#   "content_hash": "cceac37da5288a6b6716737310c14305c9b16a6e0ff0abce4a306c3de3a59f75"
# }

curl -X POST https://api.dropboxapi.com/2/files/delete_v2 \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"path":"/test_691719_folder"}'

# {
#   "metadata": {
#     ".tag": "folder",
#     "name": "test_691719_folder",
#     "path_lower": "/test_691719_folder",
#     "path_display": "/test_691719_folder",
#     "id": "id:25N5ksooX-sAAAAAAAQyqA"
#   }
# }

curl -X POST https://api.dropboxapi.com/2/files/restore \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"path":"/test_691719_folder/test_691719_file","rev":"5fe1b50581a7c021eccc7"}'

# {
#   "name": "test_691719_file",
#   "path_lower": "/test_691719_folder/test_691719_file",
#   "path_display": "/test_691719_folder/test_691719_file",
#   "id": "id:25N5ksooX-sAAAAAAAQyqQ",
#   "client_modified": "2023-06-14T18:42:28Z",
#   "server_modified": "2023-06-14T18:43:47Z",
#   "rev": "5fe1b5501cafb021eccc7",
#   "size": 27,
#   "is_downloadable": true,
#   "content_hash": "cceac37da5288a6b6716737310c14305c9b16a6e0ff0abce4a306c3de3a59f75"
# }  

curl -X POST https://api.dropboxapi.com/2/files/get_metadata \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"path":"/test_691719_folder"}'

# {
#   ".tag": "folder",
#   "name": "test_691719_folder",
#   "path_lower": "/test_691719_folder",
#   "path_display": "/test_691719_folder",
#   "id": "id:25N5ksooX-sAAAAAAAQyrA"
# }

curl -X POST https://api.dropboxapi.com/2/files/get_metadata \
  --header 'Authorization: Bearer <ACCESS_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"path":"/test_691719_folder/test_691719_file"}'  

# {
#   ".tag": "file",
#   "name": "test_691719_file",
#   "path_lower": "/test_691719_folder/test_691719_file",
#   "path_display": "/test_691719_folder/test_691719_file",
#   "id": "id:25N5ksooX-sAAAAAAAQyqQ",
#   "client_modified": "2023-06-14T18:42:28Z",
#   "server_modified": "2023-06-14T18:43:47Z",
#   "rev": "5fe1b5501cafb021eccc7",
#   "size": 27,
#   "is_downloadable": true,
#   "content_hash": "cceac37da5288a6b6716737310c14305c9b16a6e0ff0abce4a306c3de3a59f75"
# }

If something's not working properly for you though, please share the steps/code to reproduce the issue and show us the unexpected output or error so we can look into it.