Completed Presto shops from an MSC using Presto's platform, get paid by Presto. The MSC's have paid the cost of the fees and reimbursements for their shops in advance to Presto. Presto, in turn, pays the IC directly, via PayPal. So, those shops from Presto are what would be listed on Presto's 1099-NEC. And it would be a total of any and all MSC's that had their shops available via Presto. The MSC's will not re-list those with their 1099-NEC's.
The MSC's will provide a 1099-NEC for the shops you did through their own platform(s). But, some of the companies lump fees and reimbursements together on the 1099-NEC they issue and some do not. That is where your records come in. Your records should have the totals you earned as fees and the totals you earned as reimbursements, hopefully, categorized by each company, for clarity and good bookkeeping. So, if, for example, you earned $8,000 in fees, along with $1,000 in reimbursements from one of the MSC's, and you received a 1099-NEC that listed your earnings as $8,000, then you know that 1099-NEC is correct and you do not need to make adjustments on your tax return, for that one. If the 1099-NEC showed your income as $9,000, you know they included the reimbursements and fees together and you will have to make the adjustment on your return.
If you made a small amount with a company that paid you via PayPal, the 1099-K issued by PayPal will list everything you got paid from all companies and it includes the total of fees and reimbursements lumped together. You may not have received a 1099-NEC for the small amount that 1099-K had included. Think of the 1099-K from PayPal as a reference for all monies paid to you via PayPal from any company, no matter how small. The IRS will get that 1099-K information. And if you only include the 1099-NEC's you received on your return, the IRS will see the discrepancy. Your return should show all income. Whether paid via PayPal, check, direct deposit, etc. The reimbursements have their place on your return as well.