I read project readme, checked client side and server side configurations, and no such feature exists
Yes.

Is your feature request related to a problem? Please describe.
When I select "Main Hand: Left" from the skin customization menu, the roll indicator covers the offhand slot in the hotbar (which gets moved to the right side when this setting is selected)

Describe the solution you'd like
When "Main Hand: Left" is enabled, move the roll indicator to the right side of the hotbar, or move the indicator somewhere else on the screen that won't cover the offhand under either main hand settings

Describe alternatives you've considered
Add an option to disable the roll indicator

Additional context
What using Main Hand: Left looks like currently:

Open mod settings (Mod Menu > Combat Roll > Settings > Move the arrow), drag the indicator whereever you want it.