I think the European release is legitimate. They list the CD at discogs.com:
https://www.discogs.com/release/21693718-Michael-Giacchino-Spider-Man-No-Way-Home-Original-Motion-Picture-Soundtrack
Also, the Amazon UK listing is offered by a number of highly-rated retailers, including RareWaves...
Unless they find new info about a deadly variant, I think we're at the point in the pandemic now where it's your individual choice depending on your tolerance for risk. They're not going to mandate capacities or distancing, but if you're not comfortable entering a potentially crowded...
The majority of the mass audience does not think about or worry about such things. Many probably do not even understand what people mean when they talk about "canon".