It’s not as slick looking but take a look at Ubooquity. I have it on my Linux server and haven’t had any issues. Granted I mostly use it for sharing ebook files, not reading them on the server itself so it might not be what you’re looking for

IIRC only iOS has that because apple holds a patent on that specific implementation. Which sucks because on Gboard the space bar can be quite small and the timing between activating the cursor scroll and opening the language menu seems like 0.15 seconds