I am in the USA and I see it:
https://apps.apple.com/us/app/tidal-music-hifi-sound/id913943275
In-App Purchases
- TIDAL Individual $13.99
- TIDAL Individual $13.99
- TIDAL Individual $13.99
- TIDAL Individual $13.99
- TIDAL Individual $13.99
- TIDAL Individual $13.99
- TIDAL Family $22.99
- TIDAL Family $22.99
- TIDAL Family $22.99
- TIDAL Individual $13.99
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- Learn More
From: How to switch to a different subscription plan - Apple Support
Change to a different plan using an iPad or iPhone:
1. Open the Settings app.
2. Tap your name, then tap Subscriptions.
3. Tap the name of the subscription that you want to change.
4. Tap See All Plans, then follow the onscreen instructions to complete your purchase.
For other devices, read the support article.