how to view exception backtrace in exception_handler gem?

we are using rails 6 with 'exception_handler', '~> 0.8.0.0'.

we able to configure this gem and able to show error message but we like to get an error backtrace but we not see an option to get backtrace details for and exception.

can someone help me to understand this gem support to provide backtrace?

if you know any other gem which supports backtrace with a custom error page with rails 6 then let us know.