Mine also wasn't but after an update it changed into this monstrosity
I hate chess.com new "game review" UI on android (or mobile)

I also really dislike the new review layout. The left and right arrows for clicking through the moves are unusable. It was so much better when you could see all your moves in a list, particularly when looking at a series of good (or bad) moves. I would love to see a video of someone from chess.com actually trying to use the new mobile UI to carry out a game review. Speech bubble covering the eval bar is also an egregious blunder!
Can you rotate your screen? Mine looks and works fine on my tablet.
I also really dislike the new review layout. The left and right arrows for clicking through the moves are unusable. It was so much better when you could see all your moves in a list, particularly when looking at a series of good (or bad) moves. I would love to see a video of someone from chess.com actually trying to use the new mobile UI to carry out a game review. Speech bubble covering the eval bar is also an egregious blunder!