Shipping method according to PayPal Express

Hello everyone,

I have a problem with the PayPal Express Button and the deposited shipping method. There we offer this as a payment option https://reversephonelookup.onl/.

If the customer does this, he will come back to the side where he still has to confirm his purchase. A shipping method is then always selected there. In the shop we offer two types of shipping - parcel delivery and collection. And with PayPal Express, pickup is always a defined or set shipping. The user is no longer asked in advance, but is already set automatically https://pcbuilder.onl/pcpartpicker/.

Can you define somewhere that instead of this pickup, the parcel delivery is fixed https://curated.onl/nba-reddit/?