Potential Competitions:

https://www.life-framer.com/

http://swpp.co.uk/comps.htm

https://cewe-photoworld.com/

http://www.bjp-online.com/2017/11/10-best-competitions-enter-this-autumn/
Out of date, but surely there must be a current list.

https://www.photocrowd.com/photo-competitions/all-photo-contests/

https://www.photocontestinsider.com/

https://www.theprizefinder.com/competitions/photography-competitions

http://photocontestguru.com/all-contests/

​Going to have a look at these...