How can I get my LND node to make connections over Tor, IPv4, and IPv6?
The guide you linked is a good start.

The next step is to broadcast these IPs using the externalip flag in the lnd.conf file. A sample lnd.conf file that enables connections (using default port 9735) via Tor, IPv4, and IPv6 should include the following:

(replace the 3 fake addresses with your own):

tor.active=1
tor.v3=1
tor.privatekeypath=~/.lnd/v3_onion_private_key
externalip=32.260.201.72
externalip=2001:0db8:85a3:0000:0000:8a2e:0370:7334
externalip=rvaslfkj2blahblahbalhdfsfjdflxcmnvxcvxvkfdsxcvxcvxcv.onion