This is a common misconception which is very much false.
Frozen eggs don't last indefinitely and the viability degrades over time. After 5 or 6 years they become increasingly unlikely to be viable (it's not impossible, but statistically unlikely to be fruitful).
A friend of my mum had a baby at age ~55 using eggs frozen ~30 years earlier. Not sure if that was a crazy fluke or if some methods of freezing eggs are more reliable?
That's a crazy fluke, the max I've seen claimed to be done at all is 10-14 years.
When I re-entered the dating scene a couple years ago I learned much more than I ever wanted to know about egg freezing. It's big business here in the Bay Area where there are a lot of ambitious career women.
I really think in another decade or two there is going to be a lot of lawsuits regarding egg freezing being pushed on women by tech companies to stay on the career fasttrack when they can't get a viable pregnancy.
Most of the women I know that have gotten it done also seems to have almost a willful ignorance about the failure rate; especially later in life.
Frozen eggs don't last indefinitely and the viability degrades over time. After 5 or 6 years they become increasingly unlikely to be viable (it's not impossible, but statistically unlikely to be fruitful).