There's no official NextcloudPi image for your board?

It has been some time since new boards were added as build targets for NextcloudPi (apart from the Raspberry Pi 5). I intend to change that.

You can now request your board to be supported by NextcloudPi here:

https://cryptpad.fr/form/#/2/form/view/M7tS0U81qlmc4HsQzrJist5HudbCxBfaN6Zz3HL-tz0/