Your card appears to be performing exactly as it should be. Look at the "graphics score", not the overall score, as that is combining both the CPU and graphics scores together.
The average graphics score for a 3080 (when paired with a 2700) according to their score explorer is currently 17379. Your graphics score in that particular benchmark run is 17316. That falls within a fraction of a percent of the average, well within the margin of error. And if we look at the 3080 results across all CPUs, the average graphics score is 17696, just 2% faster than your score.
Your CPU score is obviously going to be lower than many other systems running 3080s, as a new enthusiast-level card like that is going to frequently get paired with faster (and often heavily overclocked) processors. Your CPU score of 7370 is lower than the average of those running 2700s with a 3080 though, which at 8085 is almost 10% higher. And the average CPU score for all processors paired with a 3080 (which again will contain a disproportionate number of the the latest, heavily overclocked processors for a card like this) is 10430, which is significantly higher still.
I take it your 2700 is not overclocked? Judging by the clock frequency of around 3.5GHz, that appears to be the case. The 2700 comes set to really conservative clocks by default, dropping the frequency significantly when more than a couple cores are loaded to keep the power draw and temperatures low, which is the main thing differentiating it from the 2700X. It can push similar clocks with an overclock though, and should be able to push its single-core boost of around 4-4.1GHZ across all cores when overclocked provided adequate cooling is available, roughly around 15% faster than what you are likely seeing under multithreaded workloads. Even if you are using the stock cooler it should be possible to get near 4GHz, though with elevated fan noise.
An overclock would help raise your CPU performance (and score) up a bit, though it still won't quite compete with Intel and AMD's latest higher-end processors. With an X570 motherboard, you should have the option of upgrading to a Ryzen 5000-series processor though, should you feel the need for more CPU performance than an overclock can provide.
You might also want to verify that your RAM is set to operate at its full rated speed if you haven't already, as some motherboards will default to something lower if you don't specifically tell them otherwise.