You say:
[Under georgism,] there will be more pressure to use [land] in an economically viable way.
And then later you say:
If you want to reduce rents, all the usual methods apply – remove restrictions on land use, encourage higher density housing, and all that jazz.
I think that in my mind (and that of many Georgism advocates), one of the many benefits of Georgism would be that the increased pressure to use land in economically-optimal ways, will probably create increased incentives to build higher-density housing and increased political motivation remove economically-destructive land-use restrictions. This admittedly is a more convoluted path to YIMBYism than just advocating for YIMBYism directly. Nevertheless, Georgism & YIMBY-ism seem like natural complements, where each encourages the other.
You are in luck; it would appear that Elizabeth has already produced some significant long-covid analysis of exactly this nature!