The screenshot is useful. The album is marked Purchased, but the individual tracks are showing mixed states.
I’d bypass the album’s Store page and go to Account > Purchased > Music, then find Different Rooms there and try downloading the missing tracks individually. Apple recommends redownloading purchases from the Purchased section rather than purchasing them again. (Apple Support¹)
Also check Account Settings > Hidden Purchases in case any of the tracks ended up hidden. (Apple Support²)
If the missing tracks don’t appear in your Purchased history at all, especially since this started as a pre-order, I’d contact Apple Support and have them check the purchase record. I wouldn’t buy the album again while it’s already showing as purchased.
[1]: Redownload music from the iTunes Store on your PC – Apple Support (UK)
[2]: Redownload music from the iTunes Store on your Mac – Apple Support (AU)