Canon has omitted the center pin from the EOS Rebel SL3 and EOS 2000D, a decision which renders both DLSRs incompatible with almost all third-party flash accessories. Naturally, the company has not pointed this out for either device.
https://www.notebookcheck.net/Sly-tactics-Canon-has-limited-the-EOS-Rebel-SL3-EOS-250D-EOS-Kiss-X-and-EOS-2000D-Rebel-T7-to-proprietary-flash-accessories.420194.0.html
Hey this is rather false information as 3rd party TTL flashes don't use the centre pin either!
Almost every recent 3rd party flash will work perfectly well. Only purely-manual studio triggers may not work, but on a bottom of the range camera such a combination should not be needed and they started dropping support for manual sync port multiple models ago (from 60D)