Hi there,
theres several improvements that can be made.
1. Fonts loading from the Google API can affect site performance.
We recommend they are loaded locally:
https://docs.generatepress.com/article/adding-local-fonts/
2. Home page image sizes, the query loop below the Populaire artikelen if you select the Image Block inside there, its currently set to display a large image. Changing that to the medium_large or medium option would reduce its load time.
3. General Optimizations, you have a lot of plugin specific code such as Woocommerce and Mapmakers pro. And those plugins load their code everywhere…. a plugin like Perfmatters to disable those codes where it is not required is a good investment to make.
But before #3 – i see several files loading on the frontend of your site, that really should only be loaded on the backend.
Open the site in Chrome Incognito Browser as a logged out user.
Right Click -> Inspect the site to open the browser developers tools.
Go to the Network Tab and click the reload and record option to view ALL the network requests.
Filter the List by the Path column, you will see a lot of /wp-includes files, those are generally not frontend files.
This could be a plugin causing that, which would require you to disable all plugins to check if there is a cause there.