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Apple quietly deletes nearly a hundred VPNs that allowed Russians to get around censorship
(english.elpais.com)
This is a most excellent place for technology news and articles.
Suspicious!
You can use most VPN services via the Wireguard or OpenVPN apps though, or even via some of the protocols natively supported by iOS not requiring any third-party app.
Absolutely, in addition to this, you can sideload apps as well without issue. I do it all the time