Here are the official casses for the Apple iPhone 5c and iPhone 5s
Amazon.com: GUZACK Phone Holder for Running with Airpods Pouch, Running Armband Case for iPhone 13/12/11 Pro Max/XR/XS/X, Galaxy S21/S20/S10/S9/S8, Universal Cell Phone Arm Holder with Key Pocket & Card Slot : Cell
The best iPhone 5c (and iPhone 5s) cases already available online - 9to5Mac
Waterproof & shockproof case for iPhone 11 - 360° optimal protection
If you forgot your iPhone passcode - Apple Support
RUNSY 4000mAh Rechargeable Extended Battery Charging Case, External Battery Charger Case, Backup Power Bank Case Compatible for iPhone 5 / 5S / SE / SE2 (Black) : Amazon.in: Electronics
The best iPhone 5c (and iPhone 5s) cases already available online - 9to5Mac
Does the iPhone 5s case fit the 5c? - Quora
Yes, your old iPhone 5s case will fit on the new iPhone SE | Macworld
Lovers Line Art Phone Case Aesthetic Lines Cover for Iphone 14 - Etsy
The best iPhone 5c (and iPhone 5s) cases already available online - 9to5Mac