Domain Spam Score ?

Purchased a domain 2 days ago, just checked the spam score and it says 60% on one site, 56 on another and 0 on other sites.
however once i check the backlinks, i can't find any backlinks on any tool except ubersugest which showed me 2 chinese domains with high spam score as backlinks.

i added those 2 sites to disavow google search console.

Now, how long does it take to get the domain clean ?
I checked on waybck and there is no data on there as well, so is there any other tool you would suggest to check if there are more other backlinks with high spam score ?

Is it even worthy to go through all this, or it is better to just purchase a new domain ?

EDIT: I suspected something was wrong, because Big g sitemap submission was taking longer than my other previous sites time. the sitemap is submitted but no found urls in sitemap as of yet.

Spam score is nothing to rely on for real,
It's way outdated and far from being accurate,
Your best would be to make manual checks while buying a domain for both previous usage and current links,
There are a few guides about this, including a good one shared recently by @Nargil (i believe so), check them out to get a better idea

Pretty much what @hideath said.

Also, are you sure that there's just those two links? How does the history of the domain look like? Archive and all that.

The checklist in questions is this by the way, so feel free to go through it - https://www.blackhatworld.com/seo/what-is-your-checklist-for-domains-for-pbn.1342695/#post-14514468

Don't worry about the spam score. Your domain is almost new, so if you find this make sure you get any backlinks from google redirects. If you see some spam backlinks let's disavow them. then it would be best if you do some high DR DA backlinks. Re-submitted your sitemap and wait for 3 weeks. After 3 weeks you find the zero spam score.