According to the official FAQ, the short answer is NO.

They will probably release a practice test when they retire existing current version.

Long answer:

Are there any practice exams available for Databricks certification exams? At this time, there are two certifications with practice exams available. The Databricks Certified Associate Developer for Apache Spark 3.0 exam has a practice exam available for Python and Scala. The Databricks Certified Data Engineer Associate exam also has a practice exam available.

Source:Are there any practice exams available for Databricks certification exams? At this time, there are two certifications with practice exams available. The Databricks Certified Associate Developer for Apache Spark 3.0 exam has a practice exam available for Python and Scala. The Databricks Certified Data Engineer Associate exam also has a practice exam available.

https://files.training.databricks.com/lms/docebo/databricks-academy-faq.pdf

To prepare the exam:

1. Understand what will be tested in the Exam - https://www.databricks.com/learn/certification/data-engineer-professional
2. Complete the online training courses - videos
   1. Academy Training - Advanced Data Engineering with Databricks
3. Complete the lab with the code repo - https://github.com/databricks-academy/advanced-data-engineering-with-databricks
4. Go through the content (PDF - Assets)
   1. https://github.com/databricks-academy/advanced-data-engineering-with-databricks/releases
5. Practice more on delta format (understanding how it works), medallion architecture, performance issues ( spill, skew, shuffle, storage issue, memory issue)

Enjoy learning!