H1b amendment after I-140 approval

Hello everyone!! I-140 approved 3 months ago, filed H1B amendment and moved to a different location recently. Does it affect the approved I-140?

Employer will not revoke for sure as its the same company, but is there any uscis rule to stay for a certain time frame with the approved company?

PERM/I-140 is a future green card job so unless you will be staying with your current employer till you get your green card, there is no point amending I-140.