Is anybody tried to import a large wordpress blog, and use velo to fix importing issues, like inserting tags?

I’m having trouble with
I working on a migration of an online magazine with a very old php based site. I used a Wordpress site for donor, and need to import 10K+ articles (posts) to Wix Blog.

Working in
Wix Studio editor, Wix Blog, Wix Blog backend, Velo, importing from Wordpress mass number of posts.

What I’m trying to do
I would like to fix for example missing tags, or fixed vertical shaped image cropping. But tags definitely. I need a solution, and I saw that in velo I can edit draft posts with updateDraftPost function. I would try to use a function that would use in parts within the limited time.

What I’ve tried so far
Nothing at all. Importing from wordpress to wix blog is still buggy. No tags, wrong image ratios (all inserted at 576x768 pixel cropped, meanwhile the image files are imported correctly, just displayed cropped in the posts.