Here’s my lazy and unpopular solution

Privacy respecting, but not open source:

Typewise

(Also a lot less typos and faster writing once you get used to it.)

I use OpenBoard. It’s good, but my only problem is the lack of images being copied to the clipboard unlike my default keyboard.

I use openboard but it gets me mad sometimes when I start deleting characters and it removes the space between the last word…sometimes it’s really annoying!

expired

I use thumb-key, made by dessalines. I downloaded it from fdroid

If you check out screenshots, you’ll see that its a very non traditional type of keyboard that requires time and effort to get the hang of.

Once you do, you will be able to type roughly as fast as you would with predictive swipe

I use Gboard but with internet access disabled for it. I haven’t found a comparable open source keyboard yet.

I use FlorisBoard. It’s not perfect, but it has a fully featured clipboard and undo-redo functionality. Missing the swipe tho.

Try Thumb-Key. It’s a keyboard made by Lemmy’s main developer. It uses a rather exotic layout, but once you get used to it, it is so much better than qwerty.