QCAD (before version 3.27?) used to show some custom XDATA, e.g. tag 1000, even for application names that are not "QCAD", which for me was useful, so it's somewhat of a regression. (I think it was broken when selecting multiple items, maybe that's why it was removed.)

I suggest to bring that feature back, but maybe show it only when a single element is selected if that's easier.

(As a workaround/hack I guess it would be possible to rewrite the required information as QCAD compatible XDATA externally I guess.)