Hi @strictlysocialnz, thanks for writing in!
From your forum topic in WooCommerce, I understand that even with only WooCommerce and Gutenberg active, you are not able to select the region in the shipping zone. But you were able to in the past.
I’ve tested this with a new site with only WooCommerce and Gutenberg active and I’m not able to replicate this. On my test site in Zone regions, I can type in the box next to it and can also click ‘Limit to specific ZIP/postcodes’. I’ve checked also for bugs and there were no similar reports on this.
Do you recall what changes you’ve made to the site before this issue with zone regions happened? Do you see any error messages? What happens if you clear your browser cache or use another browser, are you able to select the zone region? Can you also click ‘Limit to specific ZIP/postcodes’ and select postcodes?
