Spotify hasn’t allowed in-App purchases for account signups since way back in 2016 when they had 1/10th the number of total users.
The only people who were still paying through Apple were those “grandfathered” who signed up before 2016.
Of course the liar Daniel Ek went on and on about having to pay 30% to Apple when those subscribers only paid 15% due to recurring subscriptions and their numbers were a minuscule fraction (less than 1%) of paid users. Grandfathered users were “transferred” in 2023.