This is a phone port I created on Fusion 360.

This is made to both charge and hold phones, so it can be used at home or in classrooms, the important part of it however is the fact you can print out multiple of them and they will stack together to form a tower.

This was made to hold bigger phones like the Google Pixel 9a with some space in-between, so all phones smaller than 85 mms (short way) will fit.

I suggest printing this on it's tall side up as it saves the most material and doesn't require much support, let me know if you have ideas or issues with this product!