I have no experience with Gero Wallet. But you can always use a site like adapools.org to see what rewards have been paid out to you. Here is a link of all our delegators, just find yourself and see your rewards. https://adapools.org/pool/82d9c37bb38d82a0d293ebc3ece70acfbfad20180f31e270b8351555
Do note that in the last 7 Epochs we have not managed to find a block, therefor no rewards have been paid out. So depending on the day you started staking that might be an explanation.
But rewards are always paid out, it is nothing we do manually it is a protocol design of cardano.
I hope this helps! 😃
PS: Welcome to the forum!