Those plugs are toast; yes some worse than others.
How many hours on the engine?

Seeing a bit of oil burn, some rich and some lean
Have injectors cleaned and flow tested

About 480 hours on engine.
I changed the spark plugs last winter for 2020 season. So they are barely 1 year old.

Okey thank you. But the plug that is all black, feels that it is something wrong there

Could need valve seals

Two more pictures:

Port side
https://cimg7.ibsrv.net/gimg/www.off...4d62d4522.jpeg

Starboard side
https://cimg1.ibsrv.net/gimg/www.off...32f63c090.jpeg

On what spark plug/s do you see burned oil?

Not counting the oil on the threads looks could be 7 and 6, but latest pics not as much, but there is some kind of by product. Is that rust down inside 5

okey, yes it looks like rust down inside. Dont know what the wite stuff is.

Heres some nearby pictures, also nearby picture of the 3 plugs on port side, also with rust inside.

Took the boat up in september and it have been stored in my garage tent since then.

https://cimg3.ibsrv.net/gimg/www.off...81c00e5f0a.png
https://cimg7.ibsrv.net/gimg/www.off...be860a817d.png
https://cimg9.ibsrv.net/gimg/www.off...26736166eb.png

From my rookie opinion,
has injectors been serviced
leak down/compression test
Is it stock exhaust reversion issue?
for only 1 season on plugs U got deeper problems.

Have you pressure tested your exhaust? Could be a water leak and the white stuff salt.
My plugs looked like that except the white stuff when my CMI´s gave up. Also as mentioned before, check compression.