Isn't better for you to look at this site? https://www.stakingrewards.com/assets/launching-soon I guess if that will be really useful for you dude. In this case, there was another way just like try to see that on CMC too but the problem is not a lot of the new projects are being transparent to publish information related to its staking reward. You can also try blocknet too.
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Good to see someone mentioning that website, it's my firt one to check the best POS alts / tokens to  focus on.
Guys this is the best source of the best POS tokens / coins / alts, take it for granted.