While googling I ran across this. Apparently it was introduced at KansasFest 2022 but since that always seems to be at a time I can't go, I missed it.
It is an interesting and different take on interfacing an ESP32 module to an Apple II. It uses a dual ported SRAM instead of trying to interface the ESP32 to the Apple II bus using something like 74LVC245s or through a parallel chip like a 6522 or 82C55 or through a serial chip like a 6551 or 6850.
I sent an email to the designer of the card, Nathanial Hental, with some questions and suggestions and some ideas for future development.
I'm thinking of ordering some boards from JLCPCB and an ESP32 module of the type that it calls for as well as the IDT7132 dual ported SRAM. Parts count on the card is very minimal. Basically just the SRAM, the ESP32 module, a capacitor and a couple jumpers.