Reminder: The Dropbox API will no longer accept TLS 1.0 or 1.1

I received an e-mail from Dropbox warning that "your app(s) TuneLab Tuning Files have recently made calls to the Dropbox API using a deprecated TLS protocol version."  I thought we had updated both our iOS and Android versions over a year ago.  I suppose it is possible that some users of our apps have not updated in all that time, but I would like to know if there is any test I could run to see whether or not the latest versions of my apps are using the deprecated protocol.  My inspection of the Android code shows the external library of com.dropbox.core:dropbox-core-sdk:3.1.5, which should be OK.  And the iOS code uses cocopods and references ObjectiveDropboxOfficial and a README.MD that says "The Official Dropbox Objective-C SDK for integrating with Dropbox [API v2] " which should be OK too.  The source files are dated 11/3/2020.  So that should be OK too.  But I don't trust this as proof that my apps are not using the deprecated protocol.  So how can I run a test to know for sure?  Is there a way I can simulate April 13th now?  Or monitor traffic?  The e-mail I got from Dropbox has got me worried.