Anyone successfully ported a US number while physically abroad?

Have any of you successfully ported a US number while being abroad? Most probably will be SEA but curious if it works any place. If we have a plan and for whatever reason it not longer meets our needs. In the US we simply move the number via esim and port to a different provider. Does this work the same for US based numbers when living outside of the US? Part of me thinks t-mobile will work but not sure if any of the mvno's will.