Okay for real, even if you move out in 3 years. 50/50 chance you can take the flexDf2 out and replace it with an Apex Flex ![]()
Scan it with the right app, idk, TagInfo will probably tell you.
For real world tests use https://cyborg.ksecsolutions.com/product/mifare-desfire-ev2-8k/ and a M1 test card (just in case it only checks the first 4 bytes of any tag)
Good plan!