AFAIK, the easiest way would be to go to the site:
https://iancoleman.io/bip39/

Save the site to your HD or USB and run it from an offline computer.

Enter your 12 word seed and then, lower on the page, select the address format that you need to match the recv address

(BIP32/44/49/84)

and it should give you your xpub, xprv, all recv addresses and related private keys