So many suggestions, so from a Brit in the UK here's my 10 cents worth on the issue of glare after nearly 3 years of flying a Mavic Pro from different conditions in the UK to South Africa, Indonesia and New Guinea. Firstly, wear wide-brimmed head apparel to assist your vision in dealing with bright sunlight and dark clothing that will reduce reflected glare onto your screen, whether using a phone, tablet or
CrystalSky monitor. Search YouTube for a comparison between 5.5" (1000 nits) or 7.85" (2000 nits) Ultrabrite
CrystalSky or
Smart Controller. Can't remember the poster but the much bigger, bulkier 7.85" one has clearly the brighter, sharper screen.
I've used 2 different types of hoods on the 8" Samsung Galaxy Tab S2 that I started with, the DJI hood, which is OK to a point and doesn't interfere with access to the icons & telemetry on your screen, whereas the Rantow foldable tablet monitor sunshade's method of attachment to my tablet made access to icons around the tablet's edge awkward, though otherwise a decent shading job.
I've no experience of
DJI goggles but consider this. You'd have to have a "spotter" with you to make you aware of your drone's position re. Visual Line Of Sight (VLOS), as the complete enclosure of your sight and awareness of your immediate surroundings (apart from the camera view) is nil.
My preferred solution is a pair of Epson
Moverio BT-300 HUD smart glasses with a choice of 2 different shades (three if you also purchase the Rochester Optical shades) which can give you the view of almost being in your drone's cockpit, while also keeping it in VLOS and anything around you by looking through, over or under these HUD glasses. No continually checking the image on your phone, looking up & trying to find where the drone is in the sky! It's like seeing the drone's eye view on a 50" TV screen which is 10 feet away. Take a look on YouTube for "Smart Glasses For Drones" posted by Wex Photo. This is my go-to solution which I wouldn't change. Glare, what glare?