I'm waiting for my satin hood wrap and stripes to be installed. Because matte/satin vinyl (or paint) weren't meant to be protected or maintained with anything that would add gloss to them, I've had to research what products to use and re-stock my supplies.
I've elected to go ceramic to protect my satin vinyl, and since it makes no sense to mix ceramic and wax/sealants, I'll be coating the glossy paint parts as well. I selected Gyeon's MOHS coating for my paint, and their Ceramic Matte for my vinyl, and their Cure maintenance products for both.
There aren't a lot of non-coating matte maintenance products out there. The vinyl manufacturer Avery-Dennison makes a sealant. McKee's 37 has a spray-on matte finish cleaner and protectant. Chemical Guys makes a similar product.