Pony version of the cheek heart LoRA (https://civitai.com/models/572549/cheek-heart-pose-sd-xl)
You must use a Pony model or I am almost certain you will not get anything close to a desired result.
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As for what this pose is, see the following I copy pasted from my SD XL LoRA model:
Makes the cheek heart pose, sometimes it is referred to as the Luda Cheek Heart Sign or other such names after the Kpop star that made it popular.
(Luda is a member of WJSN also known as Cosmic Girls, a South Korean girl group formed by Starship Entertainment and Yuehua Entertainment. Luda is South Korean.)
If you have access to controlnet you are better off using the controlnet I uploaded (here) with a dw_openpose and depth map. (civitai does not have either of those so I trained this LoRA on the site for this purpose.)