Wow ! I was doing some catching up reading. Dna boards are coated but its still possible for It to get damaged. Most of the time it's the ribbon cable part that connects the screen that go's first. Then eventually it causes a short on the board, even if its coated...
It is impossible to coat contacts, switches, and the chipsets you get do not have a coating on any of the soldering points you should, or can, use.
Then you can coat some of this yourself, technically speaking we can all coat chipsets, hardly as well as Evolv does, who might use robot coating, but it is possible to get a usable result with the right spray chemo and read up on 1-2- 3 step list.
Dicodes, yes those that don't have a coating, I've followed a bit, obviously since I have some, apart from the ones Dicodes sell themselves as complete mods, they sell BF 60, FL 80, EC 23 chipset.
Delro uses Dicodes on their next to latest Boro AIO, EC 23 but programmed to 3 switch function, the same also applies to C-Bot, such changes must be made in Firmware.
Then there is a manufacturer that uses BF 60 but with a small screen, another example of firmware change.
On the FL 80 there is a tiny USB on the chipset, it's been a while since I looked at the BF 60, but it's doubtful whether Dicodes does all the firmware upgrades at the factory.
PS, There is an Evolv DNA 60 C coming, it is being tested across the pond
