I've 100%ed Beach Buggy Racing on Android TV (mostly)!
For context, I've made most of my progress on the Android TV version, with some of it being done on my previous Android phone, which has since been stolen. A (possibly?) unintentional advantage is that progress can be synced between both versions, as I guess they're considered the same platform by the game. Another advantage of the Android TV version is that ads never appear (so the prompts that offer the option for are replaced with a button to pay two gems instead, similar to when the WiFi is off when playing the game). Unfortunately, I couldn't buy more than a Grease Monkey at a time due to a bug in the game's code which did not let me choose any option in the menu that can be triggered before a race starts, letting me only buy one Grease Monkey right before resetting mid-race.
Some updates made it a bit harder for me to get to 100%, and let's just say that some of the achievements are annoying as hell. The last thing I had left to get was the Ball and Chain powerup of all things... (btw powerups are expensive as hell for directly buying them with gems. Thankfully I could just use the daily rewards and the coconut minigame to get them for free.)
Honestly, this game is a surprisingly good physics-based Mario Kart clone for casual players, but it's absolutely infuriating for completionists. Luckily, I can tell you that not everything is actually needed to 100% the game. The paid cars and a third of the Easter eggs are not required, for example.