Hi,
I'm not sure if any of this will help, but here goes.
Since this started, I have deleted my Hotmail account and all the Blackberry software form my phone and Tab (Galaxy S24U, Tab S5e) numerous times on both devices and have managed to reinstall them each time, albeit taking many attempts.
I would suggest trying to add your Hotmail using the Blackberry Hub Services, just using the default settings. If you get told authentication has failed just keep resending it, it often takes tens of times, but in my case it eventually accepted it (I sometimes left it a while, in frustration). I am currently not using two-step authentication on my Hotmail account, purely because it's a hassle generating passwords; but it has worked using both types.
Mine is currently working, I am still getting the change password message, and sometimes I will try and input my password, sometimes it takes it, sometimes it doesn't, but even when it doesn't, if I leave it, the app does eventually synch with the server later.
My Phone is obviously running Android 14, but the Tab is running Android 11, the version of the Blackberry software on both is the same. Not sure what version of Android your Motion will be running, but I suspect the Blackberry software will be the same as mine 2.2346.1.234602215
I hope this helps, with luck and a bit of perseverance, you may be able to get your Hotmail up and running; however, there is still an issue, that I'm not sure is going away anytime soon.