Hi Dex139, having been in your situation I sympathise. I was asked to stop HRT prior to 2 episodes of major surgery in 2019-20. I took in a then current BMJ article to show the surgeon that no increased risk of clotting had been found with transdermal HRT, & though he sympathised he said it was hospital policy that all forms of HRT should be stopped prior to surgery. I could choose not to comply but he would have to note in my records that I'd been advised to stop & had declined to do so. The surgeon had been very good to me & I didn't want to make a fuss so did as advised & stopped HRT on both occasions, continuing without it for the advised period post-op.
For more recent surgery at a different hospital, a more major procedure than the first 2 ops & with a longer recovery period, I was advised
not to stop HRT & so continued with it.
Today I can't find the same BMJ article but you might find this link & extracts from the Balance website helpful:-
https://www.balance-menopause.com/menopause-library/do-i-need-to-stop-hrt-before-surgery-factsheet/"Transdermal estrogen
If you take estrogen through the skin (transdermal) via a patch, gel or spray, there is no need to stop taking your HRT before or after surgery, regardless of the type of operation you have.
Studies have shown that there is no increased risk of clot with:
body-identical micronised progesterone, known under the brand name Utrogestan in the UK"
Please don't take this as a recommendation to go against medical advice, rather as info that may help you in discussion with your surgeon if you prefer not to stop HRT.