The website walletgenerator.net was actually sold in 2017. Regardless of that, nobody should have assumed that it was ever safe.

https://www.reddit.com/r/Bitcoin/comments/kullxn/two_out_of_the_top_three_paper_wallet_generation/

https://www.coindesk.com/markets/2019/05/27/researcher-discovers-serious-vulnerability-in-paper-crypto-wallet-site/

https://medium.com/mycrypto/disclosure-key-generation-vulnerability-found-on-walletgenerator-net-potentially-malicious-3d8936485961

The domain resolves to 185.178.208.185 which is in Russia, this IP has been flagged several times for abuse...

https://www.criminalip.io/en/asset/report/185.178.208.185