No sudden spike of block time and I disagree to call that Bitcoin has a network congestion.
Depends on what you say this congestion refers to:
- network health, yeah is not congestion because the network can't carry more data to experience packet loss
- transaction confirmation it's pretty much a congestion there, there are more tx waiting than can pass in the next block, and the moment even on of them is refused because of lack of space you have text book traffic congestion.
Even when we didn't have Ordinals, fees were quite high for payments purposes.

The median fee was almost all year except for the first Ordinal spam wave and the now second one below 1$ on average, constantly touching 10-20 cents range, it might have been much for some countries but when I see my favorite coffee at 1.99 euro 10 cents is still doable, once you go over $10 it becomes less than 1%.