I-765 Application with OPT I-20

I filed E/I-765 in Sep 23. USCIS did not ask any document when I applied it.

And I was tested Biomatrix on Oct.

Somebody said me I should sent OPT I-20 to USCIS.

Sould I send new I-20 by mail?

You should check the requirements on I-765. If it requires than you need do. Did it ask you send it when you filed it electronically ? If not, then you do not need to. You can couble check with your DSO to get confiramtion on the same.