You can add a note about your activities but digital nomads means working and you can’t work in Thailand on tourist visa.
What are you doing as a tourist in Thailand ?
For example I said I’m coming to look at Muay Thai camps to decide on one.
I got the visa In 4 hours.
Thailand doesn’t want digital nomads to backpackers anymore so don’t use the reason that you are basically coming to work in Southeast Asia you’ll get denied.
Come up with a legit tourist activity if you are worried about it.