It would be more convenient to order from a single place to save on shipping.
For example I am interested in your Nitrokey FIDO2 tokens and HSM2 preferably as a flat smart card.
Also adding a compatible SC reader with a PIN PAD like Reiner SCT Cyberjack would be very helpful.
May be you could test also other readers mentioned as supported on the open CCID driver page and having PIN PADs like: SCM SPR 532, Kobil KAAN Advanced, Cherry ST2000
with OpenSC and verify that their PIN PAD actually works correctly for a PIN confirmation especially with desired SC-HSM2 4K smart cards, and if they are compatible then you could add them to your shop too.
It would more convenient to order everything needed for a HSM2 flat smart card from your single reliable shop being sure they have the latest stable firmware and are all tested for compatibility with each other than ordering all of them from different places with unknown compatibility, unknown firmware levels and often sellers not competent enough even to answer corresponding technical questions.
May be sometimes in the future you could reach an agreement to being allowed to rebrand them as a Nitrokey