Hey Joshua!
The max label width property can only be used to make the label less wide, which can be a bit confusing. At the moment it can make the label less wide than the default (i.e. with label max width blank), but it can’t make it wider than that default size. This could be hacked using custom css, (How to write custom CSS in Retool!) but really it’s something we’d need to build in better long term control options for