Help https://help.libreoffice.org/7.1/en-US/text/shared/optionen/01010800.html still shows OpenGL, instead of Skia.
Seth Chaiklin committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/help/commit/f7bffa21c346dc8ce9db41e8753bef8d033968d9 tdf#137680 update Options - View help page, including Skia
Seth Chaiklin committed a patch related to this issue. It has been pushed to "libreoffice-7-1": https://git.libreoffice.org/help/commit/b7227e7f464302207d5aa9e258ab77bbc42e9676 tdf#137680 update Options - View help page, including Skia