Is it possible that the bitcoin sent to the address that was made beyond the gap limit will be returned to my wallet?

Hi to everyone, i have a problem on my bitcoin wallet. i have a store website that works with Bitcoin payment gateway, I wrote the payment gateway with Electron Python package "electrum.org". now more than a thousand addresses are created in the gateway, the problem is that customers who pay some BTC to their address, it does not show in my wallet. is it because of the gap limit? if Yes, is possible that the bitcoin sent to the address that was made beyond the gap limit will be returned to my wallet? what exactly happened to these money?

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Thanks in advance