A word of warning about a first grandchild, as when I saw mine for the first time , I fell overwhelmingly in love and went into over drive buying and suggesting.
However, it was a daughter not a daughter in law. You are not your daughter in laws Mother, and however much you think you are being helpful by suggesting.....DONT.
At least my Daughter could tell me candidly when she disagreed with me...
DILs can be much more circumspect. You can end up losing your GCs. There is plenty on Gransnet highlighting the problem.
Just think back to a situation where you were given advice by your MIL? Was it welcome ?
Don’t speak and DONT suggest anything is my advice. Even if they want to call the baby Cowslip ....suck it up.