You can find them using the block browsers of the selected coin. To do this, you need to install a crypt currency wallet, add to it and vote for the selected validator, ie delegate your coins. Supported wallets can be found on the official website of the crypt currency. Usually you can get your coins back no sooner than a few days after delegation. The freezing period can be from 3 to 30 days, depending on the crypt currency. Through crypto wallets. There are crypto wallets that support the stacking. All you have to do is deposit the crypt currency and activate the service. Coins are reserved for the duration of PoS. Here are some wallets that support PoS: Ledger hardware wallets; Crypto.com; Cobo; Trust Wallet (from Binance). Through crypto exchanges. This service is supported by many crypto exchanges. When you make a deposit or buy tokens on the stock exchange, they are kept on stock exchange wallets all this time. Exchanges receive income from stacking and pay most of the income to ...