After learning about the location from me on April 27, 2024, @zihaowang did indeed find Fissidens still occurring there:
https://www.inaturalist.org/observations/210486511#activity_identification_141b4b20-532f-4fc5-9a1a-5388e09278e1
Small, gray-green foliose lichen growing on trunk bark of a mature tree. Soralia are laminal and excavate.
Growing on cedar right next to Punctelia rudecta. Shoreline beach ridge.