Override domain in TLS request - lets-encrypt

Question

I am running Caddy 2.6.3. Let’s say I have two domains, domain1.net and domain2.net, Let’s Encrypt should be enabled for both, DNS-Challenge is not an option for me, so I can’t use wildcard certs.
I would like to redirect domain1.net, domain2.net, and www.domain2.net to www.domain1.net.
What I basically do is this:
domain1.net, domain2.net, www.domain2.net {
redir https://www.domain1.net${uri}
}
www.domain1.net {
file_server
}
This works well, however, in fact I do not have just two domains, I have around 20. So listing all the domains one by one would not scale well. So I changed to do this instead, to not having to specify www.domain.net and domain.net all the time:
domain1.net, (www.)?domain2.net {
redir https://www.domain1.net${uri}
}
www.domain1.net {
file_server
}
My problem is, that this breaks Let’s Encrypts since the “real” domain names can’t be derived from the wildcard matcher. I somehow would have to tell Let’s encrypt to always request the Cert for the actual domain as soon as a request matches my host matcher:
domain1.net --> matches, so request cert for "domain1.net"
domain2.net --> matches, so request cert for "domain2.net"
www.domain2.net --> matches, so request cert for "www.domain2.net"
domain3.net --> does not match, do nothing
I figure that there is dns_challenge_override_domain yet it seems to only work for the DNS challenge.
I wonder if there is something like :
domain1.net, (www.)?domain2.net {
redir https://www.domain1.net${uri}
tls {
override_request_domain ${host} // this does not work, but this is what i probably want to do :D
}
}
www.domain1.net {
file_server
}