Asking for cash- minimalist

As a minimalist I don’t need a lot, my partner and I both genuinely have all we need and can handle (appartment not house right now all new everything). I feel very uncomfortable saying there is no registry, or I just want cash, but definitely DO NOT want a bird house mailbox situation, I just don’t want stuff. I’m not sure how to proceed other than to say our registry is actually just a donation page for ‘X’ so they can feel like they are contributing to a specific thing.

Perhaps a first house but Idk if we will get a house soon. I don’t want to put any noses out of joint but I can’t be excited about getting a crazy amount of material gifts.

any strategies for a minimalistic couples proper etiquette?