Discussing about harfbuzz package update(FL-10072), during testing 5.1.0 version noticed dependency discrepancies between libreoffice ebuilds,

$ grep harfbuzz libreoffice-6.4.0.3.ebuild 
    >=media-libs/harfbuzz-0.9.42:=[graphite,icu]

$ grep harfbuzz libreoffice-bin-7.4.0.3.ebuild 
    media-libs/harfbuzz:0/0.9.18[icu]
    >=media-libs/harfbuzz-0.9.42:=[graphite,icu]

  

The problem is that funtoo have old harfbuzz version and there is plan to upgrade FL-10072. But  libreoffice ebuild dependencies blocks upgrade, as they look like holdover from old versions without current day adjustments.

Additionally, if we check gentoo ebuilds ( https://gitweb.gentoo.org/repo/gentoo.git/tree/app-office/libreoffice-bin/libreoffice-bin-7.3.4.2.ebuild https://gitweb.gentoo.org/repo/gentoo.git/tree/app-office/libreoffice/libreoffice-7.3.3.2-r3.ebuild ) - grep will show only ">=media-libs/harfbuzz-0.9.42:=[graphite,icu]".