I am currently debating on moving some of my websites to Webflow but when I created my free account to test the CMS I was looking simply at the SEO capabilities of Webflow in comparison with WP SEO plugins such as Yoast SEO or RankMath.
With either of those SEO plugins you can enter specific keywords you would want this page to rank for and I was not able to see that with Webflow.
Or also with WP SEO plugins you can easily do SCHEMA markups and optimize your structured date of the site which helps your local SEO.
As you have discovered, it’s a far more manual custom code affair in Webflow. You will need to add your json schema, canonical. You will have to optimise keywords in copy offsite. I was testing this out the other day https://inkforall.com/. The upside of no SEO plug-ins is just that. Not bloat and you get to learn onsite code optimisation in your own right.
I recommend looking into their documentation or reaching out to their support team to see if they have similar functionalities for keyword targeting and structured data optimization