Running Webflow and Wordpress/Wix together

Hi Webflowers. I have an issue where my client wants me to make landing pages for a social campaign but their sites [they have two brands] are on Wordpress and Wix. One thing I am thinking is that I could setup sub domains ie and then publish my Webflow pages to these new sub domains only. Has anybody done this before with Webflow? I assume it’s possible to do without effecting their live site, but is there anything I should watch out for. Thank for reading! :v:t3: