I don't have any of my own but I can make your life easier by telling you to only create one landing page, and use Twik to inject different content and create many versions of your site.
It's very easy to configure, doesn't required code knowledge, allows you change any element on the page and basically take the same page and create many to many versions of it.
I'm no expert on this matter, but cyberleads.co checks all the boxes in my view.
I don't have any of my own but I can make your life easier by telling you to only create one landing page, and use Twik to inject different content and create many versions of your site.
It's very easy to configure, doesn't required code knowledge, allows you change any element on the page and basically take the same page and create many to many versions of it.
Can save you quite some time. :)
One of my personal favorites is Mailbrew's: https://mailbrew.com/