That's an interesting question so I did a quick Duck and turned up a few things.

[1] Is APKPure safe to use? https://nordvpn.com/blog/is-apkpure-safe/

[2] "APKPure is not safe, distributes Trojans" (2021) https://www.kaspersky.com/blog/infected-apkpure/39273/

[3] Claims that APKPure is now owned by Blizzard Entertainment https://chimgadar.blogspot.com/

[4] Shows their 2014 seed round https://www.crunchbase.com/organization/glance-app/company_f...

[5] https://www.avg.com/en/signal/is-apkpure-safe

Short answer? I am not sure but then I use F-Droid which has the same pros and cons as APKPure so [shrug]