well, i wouldn't call that beeing bootstrapped.

in this case the generated scheme code is just a strange form of executable file that happens to need ChezScheme to be executed.

i.e. an ELF64 idris2 linux binary vs. an idris2.scm file that needs ChezScheme to come alive.

as for Idris2 implemented in Idris2: well, yes, that's true for the current version of Idris2. but the first version of Idris2 was written in Idris1. and the first version of Idris1 was written in Haskell.