Tusks is a little indie Mastodon app by @bardi that lets you see just your posts and compose new ones (with a focus on making it easy to compose threads).
Love to see indie devs making useful little tools that do what they say on the tin and nothing more (check out the privacy policy in the attached screenshot).
BTW, I have thus edited issue from time to time, too.
Solution: two apps. #Tusky and #Fedilab. #Tusks doesn’t permit #AltText edits, which for me is awful, as I prefer posting 1st with a pic and then add the image description, as I've experienced quite a few app crashes. Now, I just use the (slower) #Fedilab instead.