There are all kinds of variations, from getting the Bluetooth fob by itself, cell phone clamp by itself, tripod by itself, turntable by itself. The choice of tripod is hard, the small ones are too small and the larger ones are too big. Here are a few configurations.
https://www.amazon.com/UBeesize-Phone-Tripod-Wireless-Compatible/dp/B07837W5NX/ref=sr_1_7?keywords=tripod+bluetooth+cell+phone+clamp&qid=1582492702&sr=8-7

https://www.amazon.com/UBeesize-Phone-Tripod-Wireless-Compatible/dp/B07837W5NX/ref=sr_1_7?keywords=tripod+bluetooth+cell+phone+clamp&qid=1582492702&sr=8-7

https://www.amazon.com/Universal-Smartphone-Bluetooth-Vertically-Horizontally/dp/B07613LNZT/ref=sr_1_6?keywords=tripod+cell+phone+holder+bluetooth&qid=1582492834&sr=8-6

The Bluetooth fob is easy, just scan on the phone, then turn the fob on to pair. The camera still needs to be turned on manually, and the fob only works the camera shutter, not video (maybe higher end fobs have this), but it is fast. The trick is set up the rear camera for HDR and highest resolution.

Now, I am wondering if two cell phones will take shots at the same time.

I use this one: https://www.amazon.com/dp/B07837W5NX?ref_=cm_sw_r_cp_ud_dp_F6DQG7GGYX3WT6GRX77B

For the court I was on, I actually went up the bleachers and attached the mount to the guardrail in front of the 1st row