Need help with #Prosody #xmpp server

I have a #matrix bridge (matrix-bifrost with xmpp.js backend), which uses components. So, my config looks like this:
VirtualHost "rijndael.cc"
Component "muc-xmpp.rijndael.cc" "muc"
Component "bridge-xmpp.rijndael.cc"
component_secret = "[REDACTED]"

So for now, if someone at sends message to bridge-xmpp subdomain everything works. But I want my JID be at rijndael.cc, not on bridge-xmpp.rijndael.cc

What should I do? I tried to set up SRV records for domain to point on subdomain, but this doesn't work. Do I need to configure delegation (howwww) in prosody, so my component will take over control on whole server?