Hi Ari,
Yes, this cooktop can be installed on top of a built-in oven; however, it is best to consult the complete installation instructions of the built-in oven. In addition, I have shared this model's installation guide below. Please visit the link and turn to page 5.
https://downloadcenter.samsung.com/content/EM/202502/20250203180218156/DG68-01383A-03_IM_CC70F30S2DAA_EN-MES-CFR_250111.pdf
Should you have additional questions, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number 1152075246 to help our team pull up your information.
Leo