I feel for you. In a similar situation. Fewer failures, no aftermarket warranty. Have posted on Twitter and Reddit but only recently becoming active on here. So I'll summarize.
2020 MYLR.
First heat pump started dying at 45,000, fully died just after 50,000. Had to battle with Tesla from 45k on that something was indeed wrong and then to get it fixed. Heat pump only replaced under warranty (saved @$1300). This was after 1 year of ownership and in the middle of peak Florida summer heat.
Went through same exact pattern 50,000 miles later in summer of 2022. This time, Tesla quoted $250 for freon and then $4,000+ to replace the entire system: Heat Pump, Supermanifold, etc. I declined.
Attempted to have Electrified Garage (related to RichRebuilds) investigate but they won't touch the AC system in the Y. Have not been able to find any other shop that can and will work on the freon system for this car. (Anyone know a shop anywhere in the country that will?)
I have gone without cooling ever since. Heat works well even when as low as -10 outside. AC does not cool if above about 80 outside. Dog Mode and Camp Mode cannot keep up if above about 75.
Still love Tesla but do so with a broken heart. Recently ordered a 2023 MYLR. Planning to purchase extended warranty this time. After delivery of the 2023, will likely cave and pay the $4,000 to repair the 2020 and then put it on Turo until that cost is fully recovered.