Red stain (alga?) on cherry tree bark and concrete slab. Perhaps Trentepohlia umbrina or Trentepohlia aurea?
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
You're probably correct with your identification but it would need a close up photograph showing the the filamentous structure to confirm
Lat/Lng: 49.6, 11.1