On screenshot you have seed and coords, not everytime must generate like that, but its possible.
MC-214023
Like levitating grass, glow lichen can generate in levitating position too.
Resolved
Duplicate
0
Lukas
(Unassigned)
Unconfirmed
(Unassigned)
21w05a
Retrieved
Even though something different is floating, this is still a duplicate of MC-610