You can compile and run Mudlet on the raspberry pi now! It does not have the 3d view for the map component, but the 2d view works fine and the rest of the client functions just the same. I used a 4gb pi4 for compiling and testing, and when I wrote the instructions for getting it going. I think it would probably run fine on a pi3 as well, but have not had the time to test this theory yet.
The instructions are on the mudlet wiki at https://wiki.mudlet.org/w/Compiling_Mud ... _buster.29 .
If you have any questions or need any help, there is a Mudlet discord you can reach by clicking the Discord button in the client. It will open up the invitation url in your web browser.
Here's a picture of Mudlet running on the pi, connected to one of the profiles which is provided by Mudlet on installation.