It's a little strange that in this day and age, there's not a better place to put your phone in a Grenadier! I was struggling with this problem as well, but didn't want to block anything. I believe I've landed on the perfect solution: why not use the empty space on the overhead panel?
I've been using this design for the past few months to validate it, and personally, I love it. it keeps your phone out of the way and charging at the same time. it's easy to glance at if you need to, and easy to disconnect/reconnect because the charging is wireless. It also has space for both the driver's and passenger's phones. It is out of your line of sight and out of the way (I'm 6'2"). There's a few caveats though:
1. it does require cutting off the "grenadier" panel, although it's easy, and the factory panel can be reinstalled.
2. it also requires drilling a hole for wires through the under-panel of the middle console (it's easy, and not visible)
3. you have to run power from somewhere... for me it was easy enough to run it down to the driver's footwell, though it takes a little snaking through the panels.
I have it up on my website as a "pre-order" and have a couple of people interested... but if there's enough interest, I'll start producing them. They would come with the two Ram-compatible mount points, and then you could accessorize as you see fit.
https://www.octodyne.net/products/p/overhead-mount-for-ineos-grenadier if you're interested or have improvements, I'd love to hear your thoughts here on the forum, or feel free to sign up on the octodyne.com too.