In Users → Manage, find the new account, named after the customer's name in Paddle (or their email address, if Paddle has no name for them), with the email address as its username. It belongs to Registered and Gold Members. The email address you used received Your account on your site's name, PaddleSubs' welcome email, and Paddle's receipt.

In Components → PaddleSubs → Access Subscriptions, the purchase is listed: Gold Membership, the new user, a Completed transaction, valid from now until a year from now, and published.

The same email address received Your Gold Membership subscription is now active from your site.

Open the link in the welcome email, choose a password for the new account, and open the article: the members' part shows, and the invitation doesn't. My Membership lists the Access Subscription, and Billing opens Paddle's customer portal with the receipt.