Form I-140

My PD - July 2014 EB2. I have a pending 485 and got EAD and AP.
I’m a manager in my current company and manage teams in India and the US.
I would like to know how to upgrade to EB1 as International Manager.
Is it required that I work outside the US for one year?
If I visit India and work for 3-4 months, can the accumulated time over 2-3 years be used for upgrading to EB1?
I would also like to know if we can renew EAD from India and keep the current 485 processes on track.
 

Who pays for the I-140 filing fee? Employer or Employee? Do federal regulations mandate payment by the employer? Who pays the attorney fees for the I-140 form per federal regulations? Is it mandatory to be paid by the employer? Who pays for the I-1485 filing fee per federal regulations? Employer or Employee? Any federal mandate I need to know? Who pays for I-485 attorney fees per federal regulations? Is anything mandated in federal regulations?
 

I have been on H1B for almost 5 years and I recently got my PERM approved. My employer will file for I-140 soon. My question is related to priority dates. I saw one of your videos where you explained that the priority date practically belongs to the employee. So does that mean when an employee gets I-140 approval then the employee can change employer at any time and keep the same priority date for the next filing with the new employer?

What happens if an employee leaves or gets laid off after a month of getting i140 approval and the old employer decides to withdraw/revoke the application? In this case, can the new employer use the same priority date or get the new one for the employee? If a new employer gets the new one then what happens when an employee's 6 yr H1B term has finished before new i140 approval comes, does he/she get extension on H1B based on new application?

My priority date is April'14 in EB2. My current employer filed an AOS (I-485, I-765 & I-131) using a prior employer I-140 petition. My EAD (I-765)/AP (I-131) was approved a few weeks ago. My current employer didn't submit I-485J while submitting I-485 application. My current employer PERM was submitted a few months ago.

Questions:

1) Is it safe to use the EAD/AP (or) would you recommend staying in H1B until I-485 is approved?

2)  Will this filing be considered to be fraud/misrepresentation (or) Would you recommend withdrawing my I-485 application?

1) How long does one have to wait in total if the company applied for PERM (EB2 - MS CS degree), and THEN Concurrently applied for I-140 (premium) and I-485 and the country of birth is UAE?

2) Can the above be done on an F-1 (OPT + STEM OPT) Visa instead of an H-1B? And any potential issues for F-1 in this case?

3) In this scenario, how would it work if the person also submits NIW in parallel with PERM?

I filed my I140 with 180 days after Perm is approved. But after that, the I140 is denied and my Perm is expired. Can I fresh file I140 again the my expired Perm. Thank you.

My H-1B maxout date is Jan 2023. Perm process started in Sept 2021 (prevailing wages). FOr the 7th year extension of H-1B, is the PERM priority date (Aug 2022 for me) considered or the date for when the PWD and recruitment was initiated.