I can't create a new workout or edit an existing one on Garmin connect

It works on the web but it is so annoying that I cannot do it on the phone. 

I have the same problem.

It's still working for me. That's on the latest version of Android 15 and a Pixel 8 Pro. Perhaps providing some information of the system it's not working on might narrow down where the failure lies. 

I have Android 11. Is this the reason?

I was told to change the font size  down on the phone worked for me. 

oh wow, i tried and it worked, just reduce the font size down a bit and it worked. Thank you so much. I can not imagine this can be the reason.

Bad news for people with poor eyesight like me....

I cannot edit strength activiteis (neither type nor reps).

App version is 5.10 on Samsung, the watch is Epix Gen 2.

Joined your post to the existing discussion. As highlighted in this thread, you have some possible workarounds, such as reducing the font size, or using Garmin Connect Web. Suggest reporting this issue directly to Garmin Support