Joplin is a fantastic personal knowledge management (PKM) tool. Currently it has only Intel build for the Apple platform. The Intel version works on the newer apple MacBooks equipped with M1 processors with the help of emulation.
However M1 processors are using ARM architecture, so an ARM version is more efficient and responsive.
The following link is a Github page that includes instructions for building native ARM version of Joplin.
The author made unsigned pre-built images available that is ready to be used.If you trust the author, you can download the latest image from here. Apple by default not allowing to run unsigned applications. Run the following command in terminal to remove that protection:
xattr -d com.apple.quarantine /Applications/Joplin.app
(Without this step, the application could not be launched because it was unsigned and produced an error stating that the the application was "damaged.")