I guess so, yeah, though that sounds like that's a whole separate ecosystem, and positions itself as a direct competitor:
https://goteleport.com/compare/tailscale-alternative/
OTOH, a lot of people who think they need a VPN really just need tunneling and authenticated access, so I can see the pitch for why Teleport's offering is a fit for many users who would otherwise consider tailscale.
Theres more to it. This falls into the realm of privileged access management. I think if you are critical infrastructure, financial institution, healthcare tech. This is non negotiable and it is part of your compliances. Just VPN do not cut it out. At adaptive [1], we do the same for server, databases and kubernetes clusters. It is a double digit billion dollar TAM.
[1] https://adaptive.live
Not really? We use Teleport behind Tailscale.