I know mobile functionality isn't great yet, and like many I have clicking issues on my phone. Have a Galaxy S21 , and on chrome I had no luck. No taps registered at all. On Firefox I am able to get around and the clicks seem slights off by an inch but with repeated tapping I can usually pick up ground items and use inventory (though that is much more difficult).

Maybe other browsers work better in your experience?

Edit** I found that in Firefox with the right zoom on the right panel with your inventory, I could get accurate clicks in the inventory. The way it seems to work is you select a slot and then anywhere on the screen you click it will use the items from that slot. So to go through all your bones you just select one of them then tap the screen anywhere to use all of the bones. Seems you need to close the inventory to deselect a slot. Can't find out how to right click any items to drop them.