It’s part of the same issue, not separate at all.
The testing is just even more evil.
And this - if it’s okay to test a non-implanted embryo, then why not test an implanted one and abort if “imperfect”? And, why not test born babies for imperfections? Or two year olds? etc.
There is no reason not to, according to the logic used to be able to test non-implanted embryos.
And anyone who is “okay” with creating embryos and killing - “discarding” - the unwanted ones, is justifying killing tiny human beings. Embryonic human beings are human beings, not giraffes, not generic “tissue”, not amoebas.
It remains that your issue is entirely with IVF. The testing part is irrelevant. No IVF, no testing.
Since I’m not against IVF, and even considered it at one time, we have no common ground on which to further debate.