Reduce alert evaluation below 10s and customize the alert text template sent to hangout notification channel

I have an application where I am pushing the logs to Loki.
I have set up a query in Grafana (using LogQL) to send an alert in the hangout notification channel, whenever an error occurs.
In Grafana 8.x, the evaluation time could be anything starting from 1s whereas once I moved to latest grafana i.e. Grafana 10.x, I see minimum evaluation time as 10s. How can I change that?

Also, the alert message which comes in space contains a lot of information which is not needed.
Can I customize the alert message template?

Any help will be appreciated.