If the focus on TTMSFNCGrid ShortCutHint not work

OS: Debian 10 (buster) LXDE
fpc 3.3.1
lazaraus 2.1

Component: TTMSFNCGrid and TTMSFNCRibbonForm
If the focus on TTMSFNCGrid ShortCutHint not work.

Shortcut hints are not implemented on TTMSFNCGrid. We'll see if we can add support for this.

TMSFNCGrid1.Options.Keyboard.AllowCellMergeShortCut := true;
this allows the existence of ShortCutHint
scmSecondLevel

I wrote, other key (keyboard) definitions do not work properly in Grid

Yes, but the shortcut hints that are tied to TTMSFNCRibbon are not supported. As already mentioned, we'll look if we can add support for this. Right now, the shortcuts on the grid and the ribbon are 2 separate implementations and do not work together.