I'm not sure if it's a good idea to use the same glue as the one used for my samsung, but I'm sure it's a good idea to use the same glue as the one used for my samsung.
I've been using 3M double sided extra strong glue on my Samsung for a while now.

Shows once again: Don't buy Samsung devices.
The surface of the plastic is probably too porous and/or too curved.

On my Sony, the mounts on the aluminium base stick perfectly.

My tip is to use superglue or silicone glue from a cartridge. After that, however, you will never be able to remove them again.

I have exactly the same problem.
I'm going to try to 3D print some extra supports to distribute the weight better (https://www.thingiverse.com/thing:4662...)
I don't see any other solution.