Can I transfer Gc EAD Filed on L1A visa ? Need urgent help

Hi,
Please help me with below query-
Q-1: My GC was filed by company A under EB1 category PD 2017 and waiting for i485 decision (retrogression)
Due to covid situation, many (on bench) were asked to leave company
Considering this situation I would like to know if I have the flexibility to transfer from Employer A(current) to Employer B while waiting on I-485 approval? I.e. can I transfer my GC / i485 to another company ?

Note-

  1. My earlier visa status is L1 - A
  2. EAD first approved in 2018 and renewed in Dec 2019.
  3. I-140 was approved in 2018 and the company has the original document.

Q-2: heard rumor regarding executive order to ban non- immigrant visa , hope GC EAD is not in this list
as I got stuck out side US due to international flights shutdown in home country.

Kindly help me ASAP

Regards,