All DNS zones on CZDS have the same format, and AFAIK all nTLDs are required to use it. But you're right for ccTLDs -- everyone uses their own format and most

All DNS zones on CZDS have the same format, and AFAIK all nTLDs are required to use it. But you're right for ccTLDs -- everyone uses their own format and most don't even allow you to get the zone file. There are some companies though that provide similar lists from crawling data (e.g. https://zonefiles.io/ https://zonefiles.io/).