This app was mentioned in 4 comments, with an average of 4.25 upvotes
No dark theme and it's really only useful for some things. Use excel keyboard for excel and your normal one for everything else.
Keyboard for excel: https://play.google.com/store/apps/details?id=com.microsoft.keyboardforexcel
I struggled with that also. Try out Microsoft's Keyboard for Excel. It included a tab key!
https://play.google.com/store/apps/details?id=com.microsoft.keyboardforexcel
I'm not sure. to me more options is always better. There were 2 things I was hoping they would add but the fact that they would remove an option make me think they will not add more choices.
1) I know for myself I don't want the full layout. I was hoping that the default layout could get a number row. I never liked the numbers sharing the top row of letters.
2) Keyboard for Excel for Android being added to the touch keyboard layout. It is awesome on my phone. Why would Microsoft give something to android but not to their Windows/Excel users? Who knows. https://play.google.com/store/apps/details?id=com.microsoft.keyboardforexcel&hl=en
Play store link: https://play.google.com/store/apps/details?id=com.microsoft.keyboardforexcel
This is a pretty neat idea.