Ok, I understand, you use Relai the way I use [redacted] (obviously can't disclose the name yet) to onramp fiat. But then, it's not so relevant whether it's non-custodial in this case. Of course, one should move the funds out to a more secure/trusted place immediately after onramping.
It just might be confusing and/or misleading to put an equal sign between real non-custodial wallets that have no interaction with fiat/banking (and no reason not to be FOSS) and those who do provide onramp/offramp and thus have to comply with the rules of fiat world.