There are indeed full flow water pressure regulator valves that generally cost more than a restriction type. They typically have larger springs, diaphragms and internal ports. Much like a water saver shower head that restricts the volume of water presented even if it appears to have acquit pressure. You may not need the capacity my DW needs shampooing her thick hair. Volume can be lacking in the economy PRV models. Water volume, pressure can be controlled individually. We've been to several RV parks over the yrs. where the pressure approached or exceeded 100psig. They'll usually exhibit warning signs. Rule #1 happy wife happy life. Rule #2 refer to rule number 1 etc.
Best of luck.
DRV Suites ES-38RSSA #9679
GM Denali 3500HD-Max 4x, CC, 8' DRW