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My goto app is flameshot on X.
I've found it buggy on Wayland so I use the following combo with grim, slurp, wl-copy and swappy to achieve the same results :
#!/bin/bash
FILEDIR=~/Downloads/scrots/
IMG=$FILEDIR$(date +%F_%H-%M-%S).png
grim -g "$(slurp)" $IMG
wl-copy < $IMG
swappy -f $IMG