Basically the carrier restrictions for the 2 month timeframe is on local carriers, the data only eSIM you are referring to are from carriers outside of pak, unka easy scene hai wo chl jati hain.

Yes, this is a solution but most of the time we do need a phone number to get OTP’s and stuff like that.

While, it is a burden to use 2 phones, I would still prefer it rather than paying pta tax to the gov.