New H4 while extension is pending

I am looking to do H1 transfer with another employer but my spouse H4 extension is still pending.

Can I still go ahead and file H4 along with new employer while the previous extension is pending?

The new employer is requesting a scanned copy of I-539. I remember a physical copy needs to be sent. Do they accept scanned copy as well? Has that changed because of COVID?

You can file H4 again while current one is still pending.