USB-C is what is being used on new gear everywhere, not the least of which is soon with all phones to be sold in the European Union.
As for Blue, they’re at least aware of the existence of USB-C and it works in at least some cases per:
… https://blog.bluemic.com/news/how-to-use-blue-usb-microphones-with-an-iphone-ipad-or-android-device/
Check with Blue support for whichever other microphone you’re using.
Based on some third-party tech specs for Blue microphones, it seems many of the Blue microphones use a USB Mini B, and there are cables with USB-C and Mini B being offered for sale from various sources. This would avoid the adapter.
Or bring the microphone and adapter (or cable) into an Apple store, and ask to try it.
Unimpressed the Blue search did not turn up that Blue blog article, too.
TL;DR: contact Blue support. This will not be the first time they’ve heard this question.