Many rear derailleurs are designed to accommodate a max of 34T on the cassette. That won't help much.
I'd take it to a bike shop and ask them what you need to replace the stock chainring or crankset with a 46/30 unit if that is practical. Sometimes it's worth paying them to do it. While I'm happy with my 48/38/28 triple, It came with the bike. Converting yours over might create more problems then its worth.
This would provide a low gear down to about 25 gear inches. This should be fine for most situations one would use a gravel bike.