Hi Santosh,
Garrett from Adobe Analytics Support here. The 2 hour lookback is a limitation of Triggers. Triggers is intended to be close to real time. Though, I understand you use case. I think Adobe Campaign (ACS) would have a solution for your use case, but I can't say for certain as I am and Adobe Analytics expert.
I did some digging into documentation and perhaps this would meet your use case, https://experienceleague.adobe.com/docs/campaign-standard/using/integrating-with-adobe-cloud/working...
But this would just allow you to send the campaign email 24 hours after the 2 hour lookback triggered. . . So this may not meet your need exactly.
In any case, I'd suggest opening a customer care ticket with the ACS team, to see if they have a solution that meets your use case.
Good luck!