How do I get spell correction on Android?

I suck at spelling and would like to know a word I have typed is wrong or not. Ideally with a red underline.

I really struggle looking at text I have written and seeing the mistakes. I have tried Samsung, openboard, gboard. None seem to fix the issue.

I'm willing to download anything as long as it's not a privacy concern. Is there any way to get what I want.

2 comments

I have spell correction on my keyboard, using Heliboard.
As you can see in the screenshot responding your comment, i had a spelling error, underlined with red and the correction suggested above the keyboard:

It's Gboard

Edit: it seems to only work while typing. I opened my comment for editing and errors were not marked anymore.