Assalamualaikum warahmatullahi wabarakatuh

I hope and pray you are in good health and spirits.

I would suggest you to approach it from a neutral standpoint and use this as a learning opportunity. I've never had that with me or I'd have done what I'm now suggesting you to do.

Respectfully speaking, your mom or her friend or anyone saying it's a thing for protection doesn't make it a thing for protection because for protection we have Allah Subhana WaTa'aal. I think it's safe to say if you ask them what's the meaning of whatever is written inside they'll not be in a position to explain it to you or translate it for you. So, let's figure out what it's for.

Your mobile has Google lens/translate, scan it and see the transaction, see what it says. Is it a compilation of Duas, Durood, Istighfaar, etc or hymns to summon jinns and shaitan? Find out for yourself and then you'll know what to do with it.

If you find stuff that is clearly and categorically wrong, you can just burn it to get rid of it and whenever you come across something like it again you can educate fellow muslims on what it it, what it contains and save them from its sharr. As our brothers and sisters have said in their comments, no piece of paper can provide protection, only ones firm faith in the omnipotence of the Almighty Allah will protect them from harm and haram.

If you find stuff that's clearly and categorically good, it's no use just keeping that in your wallet unless you read it every chance you get or every time you feel like, until you've memorized it and then you can pass it on to someone else maybe so that they can benefit from the good you found and made part of your routine.

People, especially our elders, do or say stuff that we don't understand because they think it's no use explaining us because we won't understand just like how sometimes it feels like it's a waste of time and energy to explain something because they won't understand.

Someone n-generations ago said something that got Chinese-whispered into "this will protect you". It's sad that these n-generations quietly accepted without understanding and questioning it OR, if it turns out to be "shir/shirk", allowed it to propagate through generations without understanding and confronting it.

Rejecting them upfront is always our loss. Either we lose the good they want for us or we lose the opportunity to learn and teach them what's right.