I’ll be very honest, most potential employers will be freaked out by overlapping experience, especially if you are showing freelance experience overlapping with your full time employment. It is easy to understand why; a reader will see that you have a side hustle and think, “either this applicant isn’t going to be able to give us 100% or they are just going to leave once they get this freelance gig off the ground.”
That doesn’t mean that you shouldn’t show “side” experience if it is directly relevant and bolsters your qualifications. It just means that you have to get creative on how you present it so that readers are seeing the benefit and not the potential conflict.
If you are having difficulty figuring out how to honor all of your experience without spooking readers, I can help.