Are there sample envelopes for the ESP32 S3? My code is just about 2MB and won't fit with Artemis in a 4MB VROOM. Thank you.

Have a look at https://github.com/toitlang/envelopes You have multiple envelopes for different variants and we can accept more if you have a good use case. Also note that the same site has partition maps that you can use with Artemis.