Chip had no EE, should PBP3 know that?

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This has according to https://www.microchip.com/wwwproducts/en/PIC16F15376

Flash Program Memory with self read/write capability, so you could use space at the end of the flash program memory for your data.

Alternatively why not use a 24lc64 or similar memory chip on your board

Adding an external chip would require re-spinning the pcb. I thought about using WRITECODE and that might work but I worry about the endurance as I would like to write many times.