I realise this is a few months old now, but I have a workaround for this which might be more ideal for other people, I hate using windows elements because often times it means they change focus and disrupt the users work if you are using a desktop flow, whereas with Edge elements you can keep working with no interference.
The issue you are having seems to relate to what are known/used to be known as 'iframes', in IE there were easy ways to get to the underlying elements, it seems with Edge this is a bit harder, but there is a way, whenever you have this issue where a large element is being referred to as a macroponent, try getting a direct link to the underlying URL that gets you there... in the case of Service-Now, you would normally use the top nav bar and select "All" and "New" to create a new case for the relevant area, instead of "clicking" the element to navigate you to the page, just take the direct URL there after you are logged into service now, to get the direct URL, don't click on it, scroll to create or look at a "New" case via the nav bar, and instead of clicking it with the left mouse, right click and open in a new tab, you will note that it doesn't have the top nav bar in this view and you can actually access the elements directly!!!!!!!!!
example in my case is I have to load this URL, so instead of clicking the link, I use the Power Automate function 'Go to webpage' for this link:
fakeURL.service-now.com/customer.do?sys_id=-1&sysparm_query=active=true&sysparm_view=case
I hope this helps others.
