Looking for a good NOS with ONIE/armhf support to learn

i bought a Edgecore Networks 4610-54P since i recently heard about how you can have networks withought routers and just a l3 switch so i wanted to try it out. i was also interested in learning cumulus linux. i finnaly got the edgecore working after having to custom make a stupid microusb to rj45 cable. which is when i found out that cumulus linux is no longer avaliable without a bunch of money. i currently have ONL installed but it feels very lacking and unsupported. i took a look at other free NOS but i couldnt really find any that has recent activity most of them like OPX, DANOS all seem to have went dark in 2019.
Any recomendations would be aperciated Perferably something thats relativley commonly used and still activley maintained.

(also sorry if this is in the wrong section was torn on if this was software or hardware since its a operating system)