1) This gauge works great.
Accu-Gage Fat Bike Presta Valve Low Pressure Bicycle Tire Gauge, 30psi https://www.amazon.com/dp/B071WVG928/ref=cm_sw_r_em_apa_vuoQBbR84DC5H
2) Get rid of tubes. Tubes = lame
3) get a dropper
4) get a Bluto or Mastadon
5) Squeaking? Probably tires are too hard.
Old school. Accu-Gage Fat Bike Presta Valve Low Pressure Bicycle Tire Gauge, 30psi https://www.amazon.com/dp/B071WVG928/ref=cm_sw_r_cp_api_glt_fabc_145F2J124Y418V6V5BD2?_encoding=UTF8&psc=1
I’ve had 2 brands of digital presta go flaky (one SKS).
Get one of these in 0-30 psi model for a trail bike.
Accu-Gage Fat Bike Presta Valve Low Pressure Bicycle Tire Gauge, 30psi accu-gage
Separate gauge is better. I got an analog one, and I think they are more accurate and reliable than most digital ones.
https://www.amazon.com/gp/product/B071WVG928/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
This gauge is presta, 0-30 psi. I've been using it for a couple years now and it's been great https://www.amazon.com/dp/B071WVG928/ref=cm_sw_r_cp_apa_i_gBs6Ab1RF4DRQ