Adaptation module for Opencart Opencart 2.3 2.1

Need to adapt the module with opencart 2.3 https://opencartforum.com/topic/18953-podderzhka-dostavka-po-oblastyam-na-karte/ to work on 2.1 opencart (ocstore 2.1 exact)

The module should work with the module sipmple checkout.

Or offer another solution. Sacada: THEY delivery sushi in different city districts in different locations have different shipping cost