Can other person use my MySuica card?

I’m wondering about this since the card have my personal details. However, I think its still an adult card. My mom lost hers and want to use mine. Will it be okay if she used my MySuica card, with my name on the card?

Yes.

There's nothing technically stopping you, but in principle you're not supposed to do that.

Nooooo!! MySuica is others can not.
https://www.jreast.co.jp/suica/etc/rule/02.html
（制限事項等）
第24条
(中略)
6.記名Suicaは、記名人以外がICカード乗車券として使用することはできません。

（Suica乗車券が無効となる場合）
第43条 Suica乗車券は、次の各号の1に該当する場合は、SFを含めて無効として回収します。
(中略)
（2）第24条第6項の規定に違反して乗車した場合

So, you should buy a new one as Mom's MySuica or Nameless.
You know the difference btw both pros and cons?

Technically you can not share with someone else, if it is on name.

But as long you have not to show the card the staff you can just risk it.
I often lend my Toica card to my wife or she gives me hers since we can cover different areas.
Never had any problem.