Always great to meet another RO fan in the wild!
If you want a small bit of nostalgia, give the “Ragnarok ROO” (Ragnarok Origins) app a try. It’s not the same, but it’s similar enough that it grabbed my attention for about a year and I had some fun experiences on there without spending a single cent (though if you’re susceptible to IAPs, I wouldn’t go near a gacha game like that).