ex machina
Mu-43 Hall of Famer
I believe the Panasonic is known to be a tad sharper than the Oly at the far end, but good point.Well, you may need some post-processing too? I took a picture of the moon some days back with the Panasonic 14-140mm f/3.5-5.6, which should be similarly not-exactly-that-sharp at 140mm and not in a class above the Olympus 40-150mm at 150mm.
First image from RAW -> default settings in darktable 3.4 plus lens correction plus exposure bump, cropped a lot (likely less sharp than SOOC jpg).
Second image through some postprocessing, DxO lens correction then back to darktable for contrast, sharpness, curve tweaks, cropped a lot.
Sharpness aside, the amount of noise in your image is a bit weird to me given that it's ISO 200?
One thing I forgot to recommend to OP is to use point metering mode so that only the moon is being metered. I recall that helped a lot with my early efforts.