I think, I have got it (works so far for me).
By using the "Additional text" option of "geometric tolerance" feature, I no longer need a draft group.

Everything fits now in on single mapkey:
mapkey iso22081 @MAPKEY_LABELiso22081;~ Command `ProCmdDwgCrGtolSpecTol` ;\
mapkey(continued) @PAUSE_FOR_SCREEN_PICK;\
mapkey(continued) ~ Command `ProCmdPmaOptGtolType` `Profile of a surface`;\
mapkey(continued) ~ Command `ProCmdPmaInputGtolValue` `0.2`;\
mapkey(continued) ~ Command `ProCmdPmaChkSldPnlGtolTxt` 1;\
mapkey(continued) ~ Trail `main_dlg_cur` `Geometric_Tolerance:ProCmdPmaChkSldPnlGtolTxt` \
mapkey(continued) `RibbonPanelsOnActivate_ProCmdPmaChkSldPnlGtolTxt` ``;\
mapkey(continued) ~ Input `ProCmdPmaChkSldPnlGtolTxt__panel` `PH.abv_txt_area` `Tolerances acc. to ISO 22081`;\
mapkey(continued) ~ Command `ProCmdPmaChkGtolAlgnAbvTxt` `Align_Left`;\
mapkey(continued) ~ Input `ProCmdPmaChkSldPnlGtolTxt__panel` `PH.bel_txt_area` `linear size: ±\
mapkey(continued) 0,3\nangular size: ±0,5° \nTEDs acc. to 3D-model`;\
mapkey(continued) ~ Command `ProCmdPmaChkGtolAlgnBelTxt` `Align_Left`;
mapkey(continued) ~ Command `ProCmdPmaChkSldPnlGtolTxt` 0;\
mapkey(continued) ~ Trail `main_dlg_cur` `Geometric_Tolerance:ProCmdPmaChkSldPnlGtolTxt` \
mapkey(continued) `RibbonPanelsOnActivate_ProCmdPmaChkSldPnlGtolTxt` ``;