It does vary from trust to trust but there are some NICE guidelines which you can find online which cover the minimum standards of antenatal care.
Even pre-covid, I found early pregnancy a slow, lonely time. My booking in appointment wasn't until I was almost 10 weeks then I was 13+6 by the time i had my scan. My 16 week appt, as i said before, was very short and more of a 'hello' with the community midwife so I can understand why they've scrapped that one as 'non-essential'. Most areas stopped listening to the heartbeat at 16 weeks prior to the pandemic anyway.
So, even pre-covid, it was just one appointment between the 12 and 20 week scan.
I remember thinking it was crazy as friends in other countries have a lot more appointments and scans as standard but that's just how it is here....and obviously you still have the GP EPU, A&E, midwife telephone number etc should you have any problems.
I think the reality is that you need the most care in your 3rd trimester so that's why they've focused on keeping as many of those appointments as possible while cancelling the ones they consider 'non-essential'. It's not ideal and can be particularly stressful as a FTM but, it is what it is at the moment unfortunately and we have to just make the best of it.
On the plus side, you still have plenty of time for things to change as your pregnancy progresses. My biggest concern now is in relation to birthing partners and no visitors when baby arrives.