Custom Trigger when approval status is pending

Custom Trigger when approval status is pending

Hi,
In my organization, we have a 3rd-party tool for all approval workflows in organization as AAAA. that all approval in all software send to this software(AAAA). All manager in my organization just check inbox of AAAA software and approve or reject requests. We wanna to find any solution to send pending approval to this software in all module like request, change, solutions and purchase order.

What should I do? Is there any way?

Thanks for helping

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