Congratulations.

I admire your patience.

Thanks for posting in such an honest way.

If you are glutton for punishment go ahead and tear out your ac evaporator coil from behind the dash and give us a blow by blow description.
My Mother’s van has a slow 134a leak as confirmed by carefully threading the long probe of the Harbor Freight $50 Freon leak beeper through the center vents (barely fits).

“Red Angel” allegedly recovery unit safe leak stopper has cut the freon loss per summer in half.

https://gobdp.com/product/ac-stop-leak/