Since you are on android, you can get some improvements to your experience by installing one of the third-party mobile apps. Most people seem to like Flaming Durtles. It includes the ability to undo typos when answering.
https://play.google.com/store/apps/details?id=com.the_tinkering.wk
EDIT: it seems there’s also a way to install third-party scripts on android, but for firefox:
So, recently I found out that (most) userscripts can now be used through Firefox on Android by installing an addon called violentmonkey .
After finding out about it I made some quick changes to some popular userscripts so that they work with mobile (most use keyboard shortcuts or don’t work with touch) as I found that the android app was a bit lacking in userscript support (no offence, love the app though!)
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