Found fan's photo on X. She did not confirm where she got the tshirt that features westallen in a kissing pose from episode 3.09, The Present, of The Flash and the writing, The Gold Standard. But I can confirm that the design was exclusively put on teepublic by my husband, a graphic artist.
Westallen pose from episode 3.01, Flashpoint, of The Flash on a tshirt with the lightning bolt symbol in the background.
Iris West Defense Squad design on t-shirt with Iris West's face on a crest from a pose in a season 1 episode. #iwds
Iris West Defense Squad on a tshirt with a picture of the character's actress, Candice Patton. Art inspiration from Candice's Instagram. #iwds Link to the merch: https://www.teepublic.com/user/leroywhitakerva
Happy #WestallenWednesday. A fan of #TheFlash tv show at #MegaConOrlando wore a t-shirt of my husband's design from teepublic. DM for link/check ALT in 4th pic. Here are the pics of all the designs done about 2017-18 ft #westallen, #iriswest, and #candicepatton. On sale now for $17.