The smudge tool mode is grey, not working

[megatard]

In Photoshop this tool has many modes like colour mode which smudges only color, in gimp is just normal. is it under development?
also blur/sharpen and dodge/burn are only in normal mode

[rich2005]

You can always post an enhancement request gitlab.gnome.org/GNOME/gimp/-/issues
There might already be a similar one https://gitlab.gnome.org/GNOME/gimp/-/issues/1941

Otherwise, is this colour on transparency ? Perhaps enable the alpha lock on the working layer.

[megatard]

I guess they are aware of the missing features but it's hard to implement. Thank you