This would be incredibly useful when debugging chunk update issues, you could have it render with the standard boundary view or have it separate, with the former simply adding a number to the yellow center line as to how many updates in the past 5 seconds would suffice.

I didn't find a way to monitor chunk updates. Does somebody have an idea how I can monitor chunk updates, like an event or something?

Pretty sure forge has a chunk update event in the render pipe, but I haven't checked recently...