Sure, as long as the debits and credits are equal. I wouldn't recommend it unless it's clear what the JE is recording. Looking back 6 months from now, it may be hard to recall what's what. Entering each transaction, and then clicking 'Save and new' takes hardly any additional time than combining transactions into one entry. Just my $.02.
Thank you for posting your concern in the Community, @YS23.
I am here to help you with your query regarding making a Journal Entry in QuickBooks Online (QBO).
Yes, you can enter more than one transaction in one journal entry. Ensure that you have assigned the appropriate customer, vendor, payee, or employee. However, in doing so, I highly recommend on contacting your accountant for accurate tracking.
Here’s how to create your Journal Entry:
At the upper right panel, click + New.
Pick a Journal entry.
Select an account from the Accounts field at the beginning of this line. The amount must be entered into the right column, assuming you need to debit or credit an account.
Choose another account to transfer money to or from on the next line. You may enter the same amount in the opposite column, depending on whether or not you have entered your debits and credits from the first line.
Check the amounts - you should have the same amount in the Credit column on one line and the Debit column on the other. This means the accounts are in balance.
Enter information in the memo section so you know why you made the journal entry.