Since the issuance of merchant information is not instantaneous, please log out of PayPay for Developers in test mode after about 2 hours of waiting, and try logging in again.
Also try clearing your browser's cache.
If it does not appear after trying several times, the data may be corrupted.
We will investigate, so please contact us with your PayPay for Developers user ID as shown in the image.
https://integration.paypay.ne.jp/hc/ja/requests/new