From the latest Footsore newsletter the rules play testing has been disrupted by the pandemic, but the first version is due at the editor any day now. To quote:
“We will be sending out digital copies via email to all backers once the rules have been laid out which at the moment is looking to be before your pledges start shipping.”
Footsore are aiming to complete all shipping by end of November So that might be an approximate date for wider release? Subject to ongoing pandemic issues.