In Reactor 3, the from operator has been specialized into a few variants, depending on the original source (array, iterable, etc…).
Use yourMono.flatMapMany(Flux::fromIterable) in your case.
In Reactor 3, the from operator has been specialized into a few variants, depending on the original source (array, iterable, etc…).
Use yourMono.flatMapMany(Flux::fromIterable) in your case.