Not sure if you mean what’s available for your specific equipment ?
Thats a bit more difficult to advise as target magnitude, target surface brightness , LP Sky conditions , atmospheric conditions and moon phase plays a big roll.
Do you use Stellarium ?
You can just wander around the night sky ( zoom in or zoom out ) and easily find what’s available 24/7 , year after year.
There are still many emission nebula , galaxies , clusters and PN’s to image at present.
Of course this is governed by what view you have at your imaging location too ( obstructions like trees , neighbours etc… and altitude )
https://stellarium.org/
Cheers
Martin