You need a smart contract for staking or atleast create your token on blockchain that has a staking feature like Ethereum, Cardano and other smart contract blockchains. You need to create a pool and Staking smart contract code to create a staking feature for your token. You can search on open source site like github for a sample of code for staking. The easiest to it is to list your token on staking site such as DEX and just provide pool tokens for reward.