I'm going to selfishly take this opportunity to try to put good into the world - don't use Bluetooth for audio. Like, ever.
It has never been a reliable protocol and really hasn't gotten any better over the years. You'll notice that pro audio equipment never has connections for BT - this is not a coincidence. It becomes a needless hurdle to troubleshoot, adds potential for battery and interference issues, can have finnicky drivers, the list goes on.
Grab a USB-C (or Lightning, if an older iPhone) to 3.5mm jack and a cable.
Here's your shopping list:
Mixer with mic and stereo line-level (phone) input - https://www.amazon.com/Behringer-302USB-Premium-5-Input-Interface/dp/B005EHILV4
Lighting to 3.5mm stereo adapter - https://www.amazon.com/Certified-Headphones-Lightning-Headphone-Compatible/dp/B09MWNHBCX
3.5mm to RCA cable - https://www.amazon.com/Amazon-Basics-Adapter-Subwoofer-Gold-Plated/dp/B01D5H8JW0
... and some kind of mic, which'll plug into the XLR port.
Bluetooth = not cool for audio
Wi-Fi = not cool for conferencing
Battery-powered anything for conferencing = don't risk it