The numbers punting may be down a little bit, the increase in recent reviews which is likely tip of the iceberg would indicate quite a lot are already back in the sack 'n' crack, but there will be more than enough to keep girls busy if they have a decent reputation or location.
As OP points out, if the "quality" of SPs is poor then things are going to be rough for those looking for VFM, still plenty of bad punts to be had until each comes to the decision that it's not worth it. A smart SP will recognise that she can secure her prosperity by providing a decent service almost regardless of looks because her reputation will get around and regulars are better for business than a constant train of strangers. Canny, unscrupulous SPs will simply trade on false advertising or that they happen to be in a target rich environment of impulse punters e.g. near pubs, football stadiums, whatever social nexus where men of our sort congregate. (It would be very interesting to see the overlaid maps of SP distribution and men's places of congregation.)
With the air corridors opening most of the nations that are home to our SPs are now accessible so perhaps some will return because everywhere's economies are fucked. What doesn't play in our favour is our higher than most infection and death totals. SPs may not worry much about STIs but they definitely care about being in a coma, on a ventilator, being permanently crippled or dying, it's just down to how desperate each is for cash. Having the NHS to call on may be in our favour though.
I don't know whether now will bring about more trafficked women or more independents from abroad, I'm inclined to believe that it will be the former until vaccines and treatments are in place but then again if poorer economies tank relatively worse than ours then the incentives will be there for the latter.
No particular signs of domestic talent entering the sub 150 SP space here in London, perhaps our colleagues around the country can say if they've seen a local uptick in UK citizens entering the profession.
I suspect most are on the camming and fan sites which I have fuck all interest in. With so much quality porn freely available I don't know why anyone would spend a lot of money telling an incompetent how to diddle herself. Sex is a contact sport.
If I do return to punting before vaccine/treatments are properly in place then I won't be going back to popular SPs because they will be infection risk hotwetspots.