If received code 846 refund issued, does that mean funds have a already been sent and can possibly be received before the date posted?

The IRS would be your best point of contact to know what that code means. Per the IRS website: https://www.irs.gov/individuals/get-transcript-faqs it says:

Q13. Will ordering a transcript help me determine when I’ll get my refund?

No, a tax transcript won’t help you determine when you’ll get your refund. IRS transcripts are best and most often used to validate past income and tax filing status for mortgage, student and small business loan applications and to help with tax preparation.

The best way to check on your refund is by visiting Where's My Refund?. The codes listed on tax transcripts don’t provide any early insight regarding when we’ll issue your refund.