Here's an original Binance Square post that meets the requirements (100+ characters, mentions @NewtonProtocol, includes $NEWT and #Newt):

Excited to follow the progress of @NewtonProtocol as the Newton Mainnet Beta continues to evolve. A secure and scalable infrastructure is essential for the next generation of on-chain applications, and it's great to see ongoing development and community engagement. Looking forward to seeing how $NEWT supports the ecosystem as adoption grows. #Newt

This is over 100 characters, mentions @NewtonProtocol , includes $NEWT , uses #Newt , and is focused on Newton Protocol and the Mainnet Beta.