How to deal with my sibling suffering from depression ?

my 19F sister is suffering from depression and is abusive towards everyone, has allegedly attempted suicide 3 times by consuming my mom's tablets which we got to know a month later only after finding the empty tablets packet.

Now she's even bunking her college for many months and not not studying for her exams or doing any assignments

She was normal before COVID, but after COVID she became addicted to mobile gaming, when her phone is taken so that she can study for her exams, she becomes even more agressive cursing me and everyone to die

Repeatedly told my mom to bring her to proper psychiatric hospital for proper treatment, but my mom fears that bringing her to a psychiatrist would give her a bad name and would make it hard for her marriage if others get to know about it.

What can I do as a brother to convince my mom to take my sister to physciatrist ?