If you want a cheap & quick functional repair, use Stormsure patches. I used one on a ski jacket some years ago, thinking it might get me through a couple of days and I'd need it stitching. Still going strong many seasons later.
I've been wondering about this too! The advice you usually hear is, if it's new, a few rain storms will take the edge off the wax. But I'm very interested to hear what others say. I am also considering buying a lint brush, like this: https://www.amazon.com/Evercare-Magik-Brush-Double-Pic-Up/dp/B071YSCWBD/ref=sr_1_6?crid=G0KNVEK7NLO0&keywords=lint+brush&qid=1645396160&sprefix=lint+brush%2Caps%2C94&sr=8-6 but I'm wondering if it will strip off too much of the wax.