Welcome to the club of people who support ADL 2 natively! We’re still a small group unfortunately, but support to migrate is growing fast.
The OPT 1.4 → OPT 2 converter in Archie is feature complete, but has only had limited testing. It will work for at least some OPTs, and may give problems for others. Any issues found should be easy to fix. If you try it, please do report your results, including any issues you find, so the converter can be improved.
OPT2 is already fully AOM2, so I am not sure what you mean with ‘opt2 to aom 2 converter’. Converting OPT 1.4 to OPT 2 is quite a lot of work to get right, just directly importing the OPT 1.4 data into AOM 2 is much less work. The Archie branch that Sebastian pointed to contains the code for both processes.