Most Cosmos SDK chains — including the Cosmos Hub (ATOM), Osmosis, Celestia, Injective, and dozens of others — share the same underlying Tendermint/CometBFT consensus engine and a very similar delegation model: you delegate tokens to a validator, rewards accrue continuously, and unstaking triggers a 21-day unbonding period (a common default, though not universal).
Because these chains are connected via the Inter-Blockchain Communication protocol (IBC), assets and liquid staking derivatives can move between them relatively easily. Stride has become the main liquid-staking hub for this ecosystem, issuing 'st-assets' (stATOM, stOSMO, stTIA and others) that let holders stay liquid across many different Cosmos chains through one consistent interface.
Cosmos Hub validators can also opt in to Interchain Security, extending ATOM's validator set to secure additional 'consumer chains' like Neutron — meaning ATOM stakers may indirectly help secure more than just the Hub itself.