Hey,
In the Nano shape we would support, out of the box, also any of the newer Arduino Nanos, like the Nano 33 BLE, the Nano 33 IoT or the Nano 33 Sense.
We would also support the Nucleo 32 boards… while the STM32L series might give you some trouble, the STM32F4 or STM32G4 should be well supported.
Note also that with some effort we can probably get the L432 to work. It sounds like you were having problems with the flash memory size, which is usually something that can be fixed with options, or in the worst case by creating your own board description files…