I finally narrowed down my choices and then posted a question on the OnePlus Community Forum, but got no replies, so I'll post it here and hope for something better.
Being hard on my devices and wanting the most protective case for my new Nord N10, I decided on the Poetic Revolution. It comes with two face frames. One has a protective film and the other without the film. I figure a glass screen protector will offer more protection than the thin film, but I'm questioning whether it would be better to use the open face frame or the one with the film over my glass screen protector. I think the question is whether having 2 screen protectors will affect the functionality of the phone.
To help other owners of this phone, here is what I discovered when searching for protective holsters to carry this phone & case in. Finding protective cases is challenging, especially when the manufacturer gives false information. I wanted the measurements, so I could find a belt clip case I could carry it in (as there really isn't a protective holster style case on the market for this phone). At first Poetic said the measurements for this case are 8.39 x 4.02 x 1.34 inches. That made no sense to me, so I wrote them back, and they said the measurements are actually 7.28 x 3.78 x 1.57 inches. Even at this measurement, has anyone actually seen a cellphone case that is 1-1/2" thick? That would be awful hard to hold, yet alone carry. When my case finally arrived, I measured the box at 7" X 3-5/8" X 1-1/4" (smaller than the company's claimed size for this case) and the case at 6-7/8" X 3-7/16" X 5/8". Now that's more realistic. I now had to find a case to carry this in. Most cases are designed for specific phones (not cases), so it is hard to find ones that actually include measurements. Here is what I ended up with:
For outdoor/yardwork use:
https://www.amazon.com/dp/B097GY3SP7?psc=1&smid=A3QDGA3RYV5DIR&ref_=chk_typ_imgToDp Since it has two pockets, I'll cut a piece of closed cell foam to fit in the outer pocket for more protection. The zipper should keep much of the dirt out.
For office/around town use:
https://www.amazon.com/dp/B07WYRQ59Y?psc=1&smid=A3030489MAIDTS&ref_=chk_typ_imgToDp The case is .025" short, but, since the sides are made of elastic, I figure it could handle the extra 1/40"... not that I could easily measure something that small with a ruler.
Hopefully, this information will help others out. I look forward to hearing your answers regarding using the film face covering over my glass screen protector or using the empty face covering over my glass screen protector. Thanks for helping.