Ted here from Shopify, thanks for posting your query!
When you log into your admin, can you please open one of the orders, scroll down the end of the page and view the timeline of the order for me? It should look like this screenshot for example. Could you confirm if it was indeed Shopify Payments that was used or was a different gateway such as Paypal at the checkout?
If Shopify Payments was used, you should be able to see the exact pay period the funds were added to within the timeline section. After that, I'd recommend viewing your Payout as mentioned in this guide. Are there any pending payouts or errors appearing when you view the payout? If Paypal was used, you will need to contact Paypal's customer support for more info.
Please let me know how this goes!