Does Photopea work on Linux?
Partly. Ivan Kutskir has no Photopea desktop app for Linux, but the web version works in a Linux browser.
A free Photoshop-style editor that runs entirely in the browser and opens PSD files.
Use Photopea in a web browser
Ivan Kutskir offers Photopea on the web. Open it in Firefox, Chrome or Edge on Linux and sign in. Chrome and Edge can usually install web apps like this one in their own window.
Sources
Photopea on Linux: common questions
Does Photopea work on Linux?
Partly. Ivan Kutskir has no Photopea desktop app for Linux, but the web version works in a Linux browser.