How to inject additional metadata to a alert log telegram message after it's creation?

Hey everyone,
I would like to inject additional metadata to an existing alert log telegram message:

before:

ā€šŸŸ¢ #11060, XXX_too_many_errors__5xx_25perc
Resolved by XXX@XXX.com, alerts: 2
Source: Production - Alertmanager

http://prometheus-stack-grafana/a/grafana-oncall-app/alert-groups/XXXX 

after log message creation:

ā€šŸŸ¢ #11060, XXX_too_many_errors__5xx_25perc
Resolved by XXX@XXX.com, alerts: 2
Source: Production - Alertmanager

http://prometheus-stack-grafana/a/grafana-oncall-app/alert-groups/XXXX 

TEST MESSAGE

So, the main problem that I faced was that when I tried to click Unresolve or Resolve - TEST MESSAGE disappeared.

So, how to archive such behavior?

p.s.: In my case, we would like to inject additional chat links that are being created after the alert.

Thank you in advance!