Long story short, we want to add only .html at the end of every category for the purpose of 301 redirects.
So an old category in Squarespace is like below:
And in Magento2 we need it to be the below:
Yes, I could add them in 1 by 1 through normal Magento 2 fashion. Looking for a concept to do on mass though? So essentially just adding .html to the end of the URL redirect for categories only. Thanks.