Cloudflared Tunnel with wildcard

Just recently learned about Cloudflare Tunnel and it is exactly what I like: Simplicty, even I could do this. I want to host two websites on a Wordpress Multisite. Having two domains on the same tunnel works great. However, if I want to add a subdomain, example subdomain.domain. com, it will break everything and give me the “Error getting DNS record for uid fargotunnel”.

Please let me know if subdomains are not allowed or how else I make Couldflare Tunnel to understand a wildcard.

Thanks in advance!