How long after a Vasectomy can it be reversed? Also egg freezing

So many partner had a vasectomy 10-15 years ago whilst married to his now ex wife

He decided he didn’t want any more at that stage as things were starting to get toxic.

We’ve been together 12mths tomorrow (may 7th) but known each other for 5yrs now

He knew before we started dating that I wanted another 1 or 2 - I have 2 with my ex husband (21 and 16)

We are trying to work out if reversing his vasectomy and trying to conceive naturally would still work or if we need to look at going down the IVF/ICSI route

Also options for freezing my eggs and how long they Xan be frozen for

My daughter -21yrs old - has just been diagnosed with PCOS and I don’t think she’s considered the affects long term

She gets what it means- she’s in final year of her Bio-Molecular- Chemistry degree n understands more stuff about it than i but I want yo be able to help her if I can long term with my eggs

I am currently 39 yes old

Any advice or guidance will be appreciated

t.i.a