I didn't notice but it seems that in 2019 italian registration authority (finally!!) added support for AAAA glue records, necessary for recursive #DNS resolution based purely on #IPv6 connections.

My registrar #ArubaIT still doesn't support that in the web interface, but they were nice and fast doing that manually when I opened a ticket.

And thus, finally, after many years of wait this is finally possible:

% drill -T6 aaaa lapo.it | fgrep AAAA
lapo.it.        86400   IN      AAAA    2a01:4f8:151:1d7::7

PS: unfortunately ldns’ drill does not yet show glue records explicitly during a trace, but I will wait on that too.