Will Quasi Connectivity Come to Minecraft Bedrock?

Bedrock won't get quasi-connectivity because it's a bug. Use observer blocks instead.

How does quasi-connectivity work in Minecraft?

Quasi-connectivity is a property of dispensers, droppers, and pistons that allows them to be activated by anything that would activate the space above them, no matter what is actually in that space.

Does bedrock get Java Redstone?

Bedrock Editions. The majority of redstone mechanics work the same on Java and Bedrock Editions of Minecraft, but there are some important differences.