I would first turn off the water at the outside supply, unscrew the hose from the outside, and check the filter screen at the RV. May have gotten debris in it.
May also make sure there is good flow at the water supply with the hose disconnected, and good flow through the hose when it's connected to the city water supply but disconnected from the RV.
2019 Wolf Pup 16FQ - bought new 3/2020
2013 F150 5.0 STX SCab 4x4 SB/3.55 rear/tow pkg./36 gal. tank/1695 Payload/7350 GVWR