Hello I'm on holidays till the end of August. When I come back will send you my address via a PM, let's do something:

• You send me one of my boards. I send you back the package with one of my custom v7 boards.

Then I can also test the board. About the naming:

"src/board/sverio_paperboard_v1.c" --> Please follow the epd_board_ prefix.
epd_board_sverio_paperboard_v1.c would be fine. You can also exclude the brand and make it smaller if you want. The important thing is that your users know that paperboard is your board and it will be referenced in your examples and firmware anyways.

Hello @Pajenicko
tried this with the board you sent me and the dragon example and I'm getting:

I (132159) epdiy: Using optimized vector implementation on the ESP32-S3, only 1k of 65536 LUT in use!
I (132549) epdiy: diff: 33ms, draw: 380ms, buffer update: 16ms, total: 429ms
I (133659) epdiy: Using optimized vector implementation on the ESP32-S3, only 1k of 65536 LUT in use!
I (134049) epdiy: diff: 33ms, draw: 380ms, buffer update: 16ms, total: 429ms
E (145159) epdiy: Power Good Status: 0xFA
E (145159) epdiy: VB_PG: 1
E (145159) epdiy: VDDH_PG: 1
E (145159) epdiy: VN_PG: 1
E (145159) epdiy: VPOS_PG: 1
E (145159) epdiy: VEE_PG: 1
E (145169) epdiy: VNEG_PG: 1

using this initialisation on this PR branch on your repository:

void idf_setup() {
    epd_init(&sverio_paperboard_v1, &ED097TC2, EPD_LUT_64K);
    epd_set_vcom(1560);
    hl = epd_hl_init(EPD_BUILTIN_WAVEFORM);
}

Voltage grid wont go up after this messages. Is the board you sent me correct with this PR pinout setting?