Ok someone recommended the following to me (but for laptops; Idk if it works for phone) https://manhwatracking.com/ and I just tested it and it works.
It automatically reads the three lists (Want to Read, Reading, Already Read) from my home profile by clicking a button. Loaded all 1700ish of them onto my profile in a few mins. I don't think it reads created lists though or at list I haven't figured out how to get it to do that. But you can also add titles one by one. You just have to wait for the mangago page to finish loading to see a popup to click on.
Now, I don't know how legit that site. All I know is that it seems to work based on the 15 minutes I've had it installed. So try at your own risk.

I’m having bad ptsd from when all the covers turned white and everyone wasn’t able to read and they lost their lists, are the covers white for anyone? ( ̄へ ̄)