stylepak VS WhiteSur-kde

If you installed the themes through the AUR, then they're installed into /usr/share/themes which is inaccessible for flatpak applications. You can either copy the theme to your home (.local/share/themes or .themes) and export these directories to flatpak, or use something like stylepak to package your current theme as a flatpak addition. The latter approach is probably easier.

Oh, the response from u/ssokolow reminded me that you could probably use this: https://github.com/refi64/stylepak

Not sure how it will interact with Gradience, but try using stylepak (previously known as pakitheme), it just turn any gtk theme into a flatpak: https://github.com/refi64/stylepak

You've gotta install the theme as a Flatpak as well. This isn't a problem for me since I use Flat-Remix (which is on Flathub) but if a Flatpak for your theme doesn't already exist you should look into https://github.com/refi64/stylepak or something similar

Hogwash! This is the only one-time quick fix you need to force-apply your theme to all flatpaks. https://github.com/refi64/stylepak

If not, use stylepak.

You can use stylepak to install your current gtk theme as a flatpak.

Try using Stylepak, then.

Try stylepak.

Install also the WhiteSur-kde version

Install from https://github.com/vinceliuice/WhiteSur-kde

git clone https://github.com/vinceliuice/WhiteSur-gtk-theme/ ; git clone https://github.com/vinceliuice/WhiteSur-icon-theme ; git clone https://github.com/vinceliuice/WhiteSur-kde ; git clone https://github.com/vinceliuice/WhiteSur-cursors ; mkdir ~/.themes cd ./WhiteSur-gtk-theme ; ./install.sh -m -l -i popos -b default ; sudo ./install.sh -m -l -i popos -b default ; ./tweaks -F -s ; ./tweaks --dash-to-dock -c dark ; sudo ./tweaks.sh --gdm --color Dark --opacity solid --no-darken --no-blur -b default ; cd ../WhiteSur-kde ; ./install.sh ; sudo ./install.sh ; cd ../WhiteSur-icon-theme/ ; ./install.sh ; sudo ./install.sh ; cd ../WhiteSur-cursors/ ; ./install.sh ; sudo ./install.sh

White Sur by Vince Liu—It's perfect for Floral backgrounds for those who would like to design their own custom Environment. https://github.com/vinceliuice/WhiteSur-kde.git

This specific theme can be downloaded from GitHub: https://github.com/vinceliuice/WhiteSur-kde, and the README links to the suggested icons and cursors downloads as well.

The custom window decoration system (Aurorae) is rather ancient (and I think relatively unmaintained too) in that it uses pixels for the sizes of things, that's why some of those 3rd party ones have variants specifically for 1.25x, 1.5x etc (at least WhiteSur does).

Download KDE Neon and apply this theme: https://github.com/vinceliuice/WhiteSur-kde