APEX 18.1 to 20.2 - Question

We upgraded from 18.1 to 20.2 in one of the instances and are testing currently if the functionalities work as expected.

Question is : Is it okay to export a page from 20.2 environment and and import into 18.2 environment? Will the page behave same as it behaved in 20.2 when imported into 18.2?

The reason for this question is : Our production is still 18.2 and that may be upgraded to 20.2 only in July. Until then we have to make changes to 20.2 environment , export and then migrate to 18.2 environment.

Testing a page will sort this out, but wanted to make sure if this is an acceptable practice or if anyone has seen or anticipated such a scenario.