Sideboarding on Mobile
I have had issues with sideboarding on my Android phone. There are two specific issues I would like to mention. First, when building my deck for games 2 and 3, the deck name, mana curve graph, and deck size tracker are replaced by a dropdown menu from which you can choose "Option A", "Option B", or "Option C". These do absolutely nothing helpful to my knowledge, and they block the actually useful features. Right now I have to continually count the number of cards in my sideboard to see how many I have to add or take out. The second major issue is that the sideboard timer bar blocks the player from being able to view cards in the opponent's graveyard or exile zones, or revealed cards in their hand or library. Like the first issue, this is not a problem on pc.

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gregori128#03999 commented
I am experiencing the same issues as OP, and to be frank this renders playing best of 3 on mobile to be a completely unplayable experience. I DO NOT WANT OPTION A AND C I WANT TO SEE HOW MANY CARDS ARE IN MY DECK WHILE MAKING SIDEBOARDING DECISIONS