It does look that you have more than enough bandwidth. Zoom will only use the bandwidth that it needs. For example, what consumes the most for Zoom is video and content sharing, but as long as you have more than 5Mbps, you should be fine.
If this is a matter of quality, besides speed, you should look also at quality of Internet service. Check latency and possible data package drops. This can cause a bad experience.
If you just want a higher quality of image, HD is not on by default, so it might be worth to reach out to Zoom Tech Support and ask them if full HD can be enabled. Check the link above for more information on this.
