H1b /GC priority date is now current , recently changed employer

My friend is on h1b visa valid till sep 2028 and approved i140 from previous employer1. priority date is sep 2014 and its current based on filing dates as per mar 2026 Visa bulletin.

He recently changed job , new employer will probably take sometime to start gc process.

Can the new employer directly file i485 to get ead / GC this month? Does he need to redo perm process and wait for it to get approved? then do I-140 & adjustment of status? plz advise

What is the fastest way to gc / ead quickly considering recent job change ? Looking advice for best approach & alternatives to make this possible.

His perm from previous employer2 is probably approved as well.

looking for advice to navigate this situation and do the needed to quickly get gc /ead to be able avoid visa dependency.

How to plan for job changes & visa transfers beneficially during this time.

can we have mutliple h1b visa transfers / approvals? how to switch employers safely without impacting the GC process? Any other thing he needs to watch for? Need help in doing what is necessary to get the GC in fastest possible way.