Paye + self-employed and selling online (on vinted) for less than £1000

Hello, I have a job with PAYE and a second job as food delivery rider. I registered for self-assessment because I exceeded £1000 with deliveries. I will submit my tax return for 2023/2024, but do I have to declare items that sold on Vinted for less than £1000 as my income? Do I have to declare absolute all income for self-employed jobs or only the ones above £1000 allowance? Thanks,

Hi,
A self assessment tax return is used to declare your world-wide income and capital gains, that arose in a tax year.  
If your sales from Vinted are trading income, you would declare this as a separate source self employment on your tax return, as you will have exceed the trading income
allowance of £1,000 with your delivery business.
Please see guidance re selling on line When you may need to pay tax for selling goods or services online.
Thank you.