oh okay, sorry, considering the title I thought you were meaning that you have issues using it with NFC in particular.
sure USB should not have an issue regarding power.
regarding solo to nitrokey comparison you need to not forget that there are 2 generations of solo and therefore also 2 seperate nitrokey versions based on those.
the first generation solo (solo, solo tap, somu) with the nitrokey FIDO2
the solo2 and the nitrokey 3.
between the generations the firmware is vastly different and therefore the web updater which is made for the nitrokey fido2 shouldnt work with the nitrokey3. (the website even states nitrokey fido2 only)
also you say you have a solo, is it an original solo, or a solo2?
also while it’s generally not a good idea to do it does
nitropy list show anything interesting when run as root, or
dmesg when you plug the nitrokey in?
generally speaking maybe there’s an issue with the usb plug on your nitrokey as the ndef response with the nitrokey shows that the nitrokey likely isnt 100% dead.