Can we start working as soon as L2 visa approved?

Please review and answer the question
I applied for L2 extension, Can we start working as soon as L2 visa approved with I94 details from form I797 ? or do we need to go out and get stamp / Port of Entry I94 ?

You can start working once your L2 extension is approved with notation on I-94 that should say valid for work authorization.

Thank you for quick response!
Based on processing time- we expect our L2 extension next month. is USCIS started annotate I94 in the approval notice? Please share if you know

There is no news that I know of whether USCIS already worked on updating their system for new I-94 for L2.