If I read the datasheet correctly we’re talking about a ST7 Legacy 8-bit series (the “F” standing for having Flash in the name) that was last produced 15 years ago in Dec. 2005. I see some docs are available on ST7 8-bit MCUs - STMicroelectronics.
What tool do you usually use for programming or reading out the flash content of that micocontroller? PIO does not currently have support for ST7 MCUs (STM32 and STM8 are supported).