So to my untrained eye, it looks like much if not all of the increase is likely related to Covid?
Some of the increase is due to Covid. The proportion of maternal deaths rose from roughly 8 in 100,000 to 13 in 100,000. If you remove Covid deaths from the equation, it's 11 in 100,000.
So it's still quite a big rise, but the overall numbers are small. And some are almost certainly down to changing demographics - the biggest single cause of death was thrombosis and thromboembolism.
I don't want to be glib because there is a lot of room for improvement in maternity, but I don't think we should leap to the conclusion that this rise in deaths is entirely down to failing maternity care.