A lot of my posts have links between eachothers. Is there a way to check if these links are being clicked? :)
I would use Google Tag Manager + Google Analytics and create internal link triggers and and event tag, but that will require a bit of configuration on your end. MS Clarity is free and relatively easy to deploy which can give you some visibility into this (heatmaps) which have click data for a given URL as well as session recording. It's a pretty cool tool.
And apologies for being pedantic but "internal backlink" is an oxymoron, a "backlink" is a link from a third-party site to your site; an "internal link" is what you are trying to track.
We use Clicky.com, it is a paid tool, but very powerful, although you can try also with the free Google Anayltics as well, see on the below link a comparison between them and Monsterinsight - for basic internal link click data within your WordPress dashboard, the free version might be sufficient: https://imgur.com/RXmaKKz