iPad icons display incorrectly

You have encountered an issue with Springboard - Springboard being the background process that manages your Home Screen and associated App icons. Updating your iPad (in this case to iPadOS 26.6.1) cleared the associated system corruption.

For future reference, begin with a forced-restart of your iPad - as this will often clear an isolated or post-update software issue:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

If the problem persists after performing the restart, it may be necessary to reset your iPad settings. While this reset will not cause any loss of data, as a precaution, it is always wise to ensure that you have a current iCloud or iTunes backup before performing the reset:

How to back up your iPhone, iPad, and iPod touch - Apple Support

When you are happy to proceed, you can perform the reset from iPad settings:

Settings > General > Transfer or Reset iPad > Reset > Reset All Settings

If the problem still doesn’t clear, the next step is to reset the iPad to factory settings:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

Glad to hear you were able to fix the problem. The strange app icons are caused by incomplete app downloads. Let’s hope your iPad learnt it’s lesson and behaves itself from now on.