I have attached to two CX/MSS messages that XL7636 refers to.
When I researched jet operations in France, I only found evidence for operations from Juvincourt (the two Ar 234s of Kdo. Götz and the four/five Me 262s of Kdo. Schenck). As far as I can tell, Kso. Schenck did not arrive in France until 24 August but Kdo. Götz flew its first operation on 2 August.