The variable WIC_CREATE_EXTRA_ARGS is used in poky's meta/classes/image_types_wic.bbclass and was moved to the file in commit 02dafba6ed8ebc718a4f513455fc034444543301 but is not documented in Variable Glossary.
Bulk move of all unassigned 5.2 medium importance bugs to 5.3.
patch sent: https://lists.yoctoproject.org/g/docs/topic/patch/112653488
v2: https://lists.yoctoproject.org/g/docs/topic/patch_v2/113090043 v3: https://lists.yoctoproject.org/g/docs/topic/patch_v3/113091103 v4: https://lists.yoctoproject.org/g/docs/topic/patch_v4/113093775
Merged with commit f1cdecb6da91dbfac59359c83038cb4a4c36ad0a on yocto-docs. Moving to Resolved Fixed. Thanks!