Here's what I've been using for a phone mount in my LX570. Removed the lower A-pillar grab bar mounting bolt and replaced it with the RAM Mount 1" Ball. Personally, this is the optimal location for me. It's nearly at eye level and does not block visibility. I did end up rotating the mounting plate 180 degrees (upside down) to allow easier installation and removal of the phone. Full disclosure - I did not come up with this idea. IIRC I saw a similar setup in a Tundra forum.
I also purchased an assortment of M6 bolts in varying lengths. I don't recall which one I used, but I do recall not being able to find RAM Mount ball with M6 bolts.
Amazon product ASIN B07PV9536J
I also purchased an assortment of M6 bolts in varying lengths. I don't recall which one I used, but I do recall not being able to find RAM Mount ball with M6 bolts.
Amazon product ASIN B07PV9536J