Is this website insecure, at least the connection to it is...

[polonus]

Re: https://aw-snap.info/file-viewer/?protocol=not-secure&ref_sel=GSP2&ua_sel=ff&chk-cache=&fs=1&tgt=d3d3Lnt2e310a11rLm5sYA%3D%3D~enc
See: -http://www.evertkok.nl/ = -http://ip545020af.adsl-surfen.hetnet.nl/ = not secure -http://84.80.32.175/

Given it an all green: https://www.scamfoo.com/site/evertkok.nl/
No 3rd party trackers on this site, so it could be served up using SSL.
Has

<frameset rows="50%,50%">
        <frame src="Kolom1rij1.html" name="col1a" scrolling="no" frameborder="0" border-style:0="">
            <frame src="Kolom1rij2.html" name="col1b" frameborder="0" border-style:0="">

Website blacklisted by McAfee's: https://sitecheck.sucuri.net/results/www.evertkok.nl

Outdated Software Detected
Apache under 2.4.42

Outdated Software Detected
PHP under 7.4.4

polonus (volunteer 3rd party cold recon website security analyst and website error-hunter)