Hi there - while we are unaware which 2020 QLED model and sound system you are utilizing, we recommend connecting your sound system to your TV via HDMI ARC to receive 5.1 audio. If you are still experiencing issues, please reach out to Samsung Support via any of these options:
Phone: 1-800-SAMSUNG
Available 8 AM - 12 AM EST 7 days a week
LiveChat or Text: https://www.samsung.com/us/support/contact/
Facebook Messenger: https://www.facebook.com/samsungsupport
Twitter: https://twitter.com/SamsungSupport
The Samsung TV Community is also a great resource for getting help from Samsung moderators and customers: https://us.community.samsung.com/ ^Gina