I'm using Zola and Cloudflare Pages, and it is currently possibly to use ZOLA_VERSION=0.17.1. I thought I had opted into the Pages v2 beta (I remember joining a Discord for this purpose a while ago), but on the actual page the setting is at v1.
You can change this under Settings > Builds & deployments > Build system version. Cheers!
You can change this under Settings > Builds & deployments > Build system version. Cheers!