Here are several rewrites of the title, with varying levels of emphasis:

More concise and direct:

• Nintendo initially bans Switch 2 user for playing used Switch games, then reinstates access.
• Switch 2 ban overturned after user proves innocence regarding used Switch game usage.
• Nintendo reverses ban on Switch 2 owner after used game controversy.

More detailed and explanatory:

• Nintendo reverses controversial ban on Switch 2 owner after initial decision linked to playing used Switch 1 games.
• Switch 2 owner’s account restored after Nintendo initially banned them for playing used games from the original Switch.
• Ban on Switch 2 User Lifted: Nintendo Admits Error After Accusations of Playing Used Switch Games.

More sensational/attention-grabbing (depending on the audience):

• Nintendo Backtracks: Wrongfully Banned Switch 2 Owner Reinstated After Used Game Accusation.
• Nintendo’s Embarrassing U-Turn: Switch 2 User’s Ban Over Used Games Reversed.
• Game Over for Nintendo’s Ban: Switch 2 User “Proves Innocence” in Used Game Scandal.

The best choice depends on the context and the desired tone.