It's not critical to get it covered 100% but that does look fairly exposed! Though Intel chips have a lip around the edge so look a little smaller on top.
What cooler is it? Is it AM4 compatible by design?
You can see the chip let layout in this thread:
https://www.reddit.com/r/Amd/comments/ccrisu/ryzen_3000_ihs_orientation_vs_the_position_of/
You can figure out the best orientation for your cooler. Ideally you want your heat pipes sat as close to the CPU chipset as possible.
If it's a cooler with a plate on the bottom rather than direct contact heatpipes, it'll be a bit better. They tend to spread out the heat.