I am unable to flip an element horizontally or vertically.
Can you show an example? A file link, screenshots, video, etc?
This is a screenshot from Adobe XD with which we can easily flip a design element vertically or horizontally. Can we expect a similar feature in Figma?
This feature is available in Figma and FigJam.
Shift + H — Flip horizontal
Shift + V — Flip vertical
Please see the following Help Center articles: