How do I disable 2 step verification for Steam and PSN?

To ensure the fast delivery, you may need to disable the 2 step verification to help the sellers login and process the order fast.

Here are some guides for you to check:

PC(Steam):

https://support.steampowered.com/kb_article.php?s=ad49724d2c999b2d9b6368b60f912e96&ref=8625-WRAH-9030#disable

How do I disable Steam Guard Mobile Authenticator?

You can remove two factor authentication from your account by opening the Steam Mobile App, navigating to the Steam Guard menu item, and selecting "Remove Authenticator". This will bring you to a confirmation window, where you can confirm your choice by selecting "Remove Authenticator" again.

PS4(PSN):

https://support.playstation.com/s/article/PS4-2-Step-Verification?language=en_US

How to Deactivate 2-Step Verification from Your PS4™

1. Go to [Settings] > [Account Management] > [Account Information] > [Security] > [2-Step Verification] > [Status].

2. From the drop-down menu, select [Inactive] > [Confirm].

3. A text is sent to your phone verifying the deactivation of 2-step verification.