Are you running OIC Gen 2 or Gen 3?
Oracle Integration Cloud (OIC) Gen 3 was released in August 2022. Keep in mind if you're running OIC Gen 2 that is has already reached end-of-life on August 31, 2025.
You can tell if you're running OIC Gen 3 from the UI, as it uses the newer Oracle Redwood design as opposed to the previous white/gray/blue design of Gen 2.

To know your version, navigate to the OIC console, click on your initials, then click "About". This displays the version, but not the generation.
The Oracle documentation doesn't lay it out explicitly, so I have compiled a table of versions/generation to make it easier:
| Version | Oracle Integration Generation |
|---|---|
| 21.3 | Gen 2 |
| 22.2 | Gen 2 |
| 23.1 | Gen 2 |
| 23.2 | Gen 2 |
| 23.3 | Gen 2 |
| 23.6 | Gen 3 |
| 25.02 | Gen 3 |
| 25.04 | Gen 3 |
| 25.06 | Gen 3 |
| 25.10 | Gen 3 |