MarsSeed [1] filed a deletion request for isoimagewriter-git [2]:

Broken VCS package, uses default CMake configuration of the code,
which is for Qt5/KF5, but due to repo's recent renaming of those to
have "5" as suffix (or "-qt5" in case of qgpgme), this package now has
mismatching dependencies - some of them are Qt5/KF5, others Qt6/KF6.

Maintainer expressed unwillingness to rectify the issue, also
evidencing a lack of care which leads to technical incompetence.

But it's actually safe to delete this package: no sign of usage; last
comment apart from maintainer's is from 2017.

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/isoimagewriter-git/