Change the Order customer programtically

I need to let users “Gift” courses to other people and so far ive been able to create a woocommerce user at the ‘woocommerce_checkout_update_order_meta’ stage with the gift recipients details HOWEVER im unable to assign this user as the customer of the newly created lp_order post type that is created within orders.

I have tried every hook, every mention of userid within learnpress and hard code in an id to give me a direction but nothing seems to change the assigned user to an lp_order on creation. Any advise?