Yes, I'm 9 years postmenopause now & had my first oestradiol test on the NHS before starting HRT 3 yrs postmeno,
but only after it had been requested in a clinic letter from a Menopause specialist at a private hospital. The level was too low to be measurable - merely came back as below bottom ref range. Then had nearly 2 years on HRT with poorly controlled symptoms partly because when I asked, my then GP declined to retest because she said she wouldn't know what constituted a good level. I asked for referral to an NHS menopause clinic where oestradiol was retested & confirmed the poor absorption that explained the continuing symptoms. Was advised to avoid that brand of HRT in future as specialist thought it likely I'd get poor absorption of oestradiol from other products in the range.
Since then, to save time & the stress of pushing the very stretched NHS to provide services they don't seem to be set up for at GP level (at least here), it's been easier to have HRT overseen privately. So I've arranged private testing of oestradiol, usually together with testosterone & TFTs given the need for T3 - atypical hypothyroidism being another condition that's less stressful to manage privately for anyone lucky enough to have the means. Having the whole lot done together means I get a "package price", which works out quite a bit cheaper than the sum of the individual tests. Thankfully, given we're not that comfortably off & choose to do without other things to make this possible.
I do think it's a good idea to have oestradiol & testosterone checked now & again when on replacement, to clarify the clinical picture if symptoms are not adequately improved, so that we don't waste time on an unsuitable regimen/dose. Also seems sensible when on testosterone preparations designed for men, where there's not a measured dose dispensed for women - e.g. Testogel, where we have to estimate the size of a suitable blob according to our mental image of what garden vegetables/pulses look like! Petit pois, lentil anyone

?!
Wx