"Tendered to service provider" means your carrier has handed your package to a partner for the final leg of delivery. In most cases that partner is USPS. Your package hasn't stalled. It's changing hands.
This status shows up on economy services like UPS SurePost and DHL eCommerce, where the original carrier moves the package most of the way, then passes it to USPS for the last mile to your door. The last mile is the most expensive part of any delivery, so carriers use USPS to cover it because USPS already visits nearly every address in the country.
Companies like DHL and UPS don't always run their own trucks down every residential street. On their economy tiers, they carry your package through their network and then tender it to USPS near your address. USPS finishes the delivery. You get the package from your regular mail carrier instead of a branded van.
You usually won't see another scan until USPS picks the package up and processes it at the local post office. That gap is normal. Most orders arrive within a couple of days of this status.
If nothing changes after two or three days, look up the tracking number directly on the USPS site to check for a newer scan. If it's still stuck, contact the store you ordered from. They opened the shipment and can file a trace with the carrier.
These wordings all describe the same handoff, just with different carrier language:
Any status with the word "tendered" means the same thing: your package is in a partner's hands for the last stretch, and it's on its way.