To check tire pressure I jacked mine up and used a new tire gauge from Amazon that could take water. :)
https://www.amazon.com/Milton-S-928-Water-Filled-Pencil-Pressure/dp/B0000AXBXW/ref=sr_1_3?dchild=1&keywords=tire+gauge+for+filled+tires&qid=1623275664&sr=8-3