LWK is used particularly in casual conversations like texting, social media, and other chat platforms. It would be used by people who want to express something subtly. Most teenagers and young adults love this word when they communicate using internet slang. It can denote feelings, views, or particular scenarios, such as:
I LWK miss my ex but won't say that out loud.
This party is LWK boring. Let's leave soon.
It's casual and doesn't seem so serious. Know more: https://radarro.com/lwk-meaning/