Port to any single core ARM cortex without bluetooth is relatively easy but still quite a lot of work. However implementing the bluetooth API - mapping it to target BLE stack is even more work and not that easy.
Thanks for the answer. I think it deserves a spot in my hobby project pipeline. It would be super cool to have a TWS device programable with js.
I know its a bit vague question but do you think its possible/requires much effort to port espruino to this chip from nxp?
Its BT device dedicated for audio devices. It has two M0 cores plus a dsp.