Internal Linking Tool For 12,000+ Post Site

Can anyone reccomend some internal linking apps (WordPress/Elementor). I have a 12,000+ post site and I am looking at improving the internal links - both when writing and as a bulk editor. I have tried Link Whisper but as the site is so large it litereally takes 5 minutes to come up with suggestions for internal links. I have not tried the other features yet... SEO Juice seems insanely priced and the links appear to be removed when you stop paying them... Has anyone else had experience with large sites and internal link tools?