Custom Labels not showing in prismic new editor

I have just started working on a nextjs site with prismic, i'm trying to use custom labels in a Rich Text field, i have added them in the model as such:

"title": {
"type": "StructuredText",
"config": {
"label": "Title",
"labels": ["accent-blue", "accent-cyan", "accent-magenta"],
"placeholder": "",
"allowTargetBlank": true,
"multi": "heading1,heading2,heading3,heading4,heading5,heading6,strong,em"

I have pushed them to prismic without issue, however when I try to use them from the dashboard I don't see the option to select them anywhere in the new editor, if i go into the legacy editor then they do show.

I do not believe the Alpha page builder is yet at 100% feature parity. You can revert to the legacy page builder to use your custom labels. If you wish to "permanently" revert to the legacy editor, contact Prismic and let them know.