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In CalyxOS you can set the VPN ( ProtonVPN ) to route all your traffic ( including the work profile ) thru the VPN tunnel, giving you extra layer of protection. ( I don’t know if it’s possible on LineageOS )
Yes with the Netguard app (on fdroid) https://netguard.me/
Netguard is a firewall app, it doesn’t route traffic it blocks, afaik