Someone who understands our PDF stack should update https://www.mediawiki.org/wiki/Extension:ElectronPdfService
According to T161312#5345543, "Electron is being (has been, for the most part) undeployed; ElectronPdfRenderer now links to Proton." however that page does not mention Proton at all, and there is probably more to review, e.g. "Installation" section mentions "Electron Service".