The Australian government’s offical cybersecurity guidelines recommend - but do not require - Australian government agencies to implement DNSSEC, “where possible” and especially on their “principal domains”. In a competitive procurement, if another vendor says “you want DNSSEC? No problem!”, while you are saying “we don’t support that” or trying to argue against the recommendation - that is unlikely to help in winning the deal. If your product is miles ahead of the competition, it might not matter; if it is close, this might be the thing that loses it.
https://www.cyber.gov.au/sites/default/files/2023-03/5.%20Ga... page 18
I imagine many other (wealthy country) governments worldwide would have similar internal guidance.