I'm happy to see you again here in the Community, @userstorage123reg.
It may take 2-3 days for the GoCardless mandates to be processed and imported in QuickBooks Online. If it hasn't been imported after the said days, I recommend reaching our GoCardless support team. They have the tools to check on your transaction and determine the reason behind this matter this matter.
To give you more details about how GoCardless entries works in QuickBooks Online, you can always scan through these resources:
You can count on me if there's anything else you need. Just let me know by leaving a comment below. Take care!