As far as I’ve experienced, exporting your project code (even on the Lite plan) removes the “Made in Webflow” branding—it’s my understanding that you’ll only need a Pro plan if you want to also remove that from your .io staging domain.
The help page on the topic is a bit ambiguous on the topic however it does state that you’d need a Pro Account plan to remove the badge:
I’m pinging @Waldo to see if he can’t shed some light on the subject just to be sure.
The last response I was able to find in the Community was from cyberdave in 2019—although he does confirm it’s removed for Lite Account plans on export: