Hi Henrik,
I’ve inspected your site and see a lot of room for improvements.
The most obvious step to take would be to install an optimization plugin for your site.
Plugins like WP Rocket, Lightspeed cache or W3 Total cache are the most used here but you can use one that fits your preference.
For the optimization plugin settings, caching and merging CSS would be the first obvious setting to enable. Caching JS scripts would be next.
You can merging JS scripts as well but this may require a bit of fine tuning as plainly having it enabled without exclusions may break some parts of your pages.
You can try these first and then check your site’s page performance for any improvement/s.:)
Note: I see you’ve posted multiple topics here –
https://generatepress.com/forums/topic/my-generatepress-website-speed-are-very-slow-4-sek-2/
https://generatepress.com/forums/topic/my-generatepress-website-speed-are-very-slow-4-sek-3/
Let’s continue the conversation on this thread so we don’t have to maintain the other ones. Thanks! 😀