Combining Dot Below (U+0323) with Greek

[wseokk]

Is your feature request related to a problem? Please describe.
I don't think this is a bug report but a new feature request. Sometimes it is needed to place underdots below Greek letters. This is an established practice in Papyrology in order to indicate uncertain readings. But when U+0323 is combined with a Greek alphabet, the underdot is weirdly placed in most cases. This is because, I suspect, relevant anchor data is missing.

See especially lowercase (beta), iota, (mu), (rho), (tau), phi, xi, psi, and uppercase phi, psi. As is expected, underdots overlap with iota subscripts.

Describe the solution you'd like
It would be great if Noto incorporates the relevant anchor data, so that underdots do not overlap with the Greek letters above!

Additional context
Recently a german academic publisher De Gruyter announced a slightly modified version of Noto Sans/Serif SemiCondensed (De Gruyter font: https://blog.degruyter.com/how-de-gruyters-new-open-source-font-came-to-be/). It appears they added this feature. But the result does not seem to me ideal, when compared to the result by Brill.

[simoncozens]

I'd be very happy to upstream any improvements de Gruyter have made. Shame they didn't consider improving Noto itself...

[moyogo]

The new Greek glyphs introduced the regression because they didn't have all the anchors.
The fix is to add the anchors not to revert to the old Greek glyphs, as De Gruyter uses an old version of Noto.

[wseokk]

Oh, I understand. So there had been those anchors in the old Greek glyphs, but gone when the new Greek design was introduced. I've just checked this with version 2.009... Thank you for pointing this out!