There are a few ways PMOs can handle this, depending on how much they want Jira to own.
If Jira is the main delivery system, tools like Tempo can help connect Jira work and time data with budgets and costs.
BigPicture is another option if you want to extend Jira into broader portfolio, resource, and financial management.
Another model is to keep Jira for engineering delivery and use a separate PPM platform for the wider portfolio view.
Full disclosure: I work with Celoxis.
With Celoxis, Jira can remain the delivery tool while the PMO manages schedules, resources, time, costs, governance, and portfolio reporting in Celoxis.
This becomes useful when leadership wants to understand both sides together for example, whether a project is behind because of delivery delays, resource constraints, or rising costs.
If the need is mainly financial tracking around Jira, extending Jira may be enough. If the PMO needs broader portfolio, resource, financial, and governance visibility, a PPM layer can make more sense.
Curious how others are handling this in practice.