Here in CA one birthplace of the internet, I have to print a paper check for the landlord like it's the 70s.
I haven’t written a paper check to a landlord in over 15 years (but I had to do the money bags thing for a few years in China). Heck, even if they don’t have online payments setu, you can usually just auto send them the money as a payee (I do this with my daycare). It’s annoying when I do need to use a paper check once or twice a year, I just go to the bank for a temp check (which is the only time I visit a bank branch also).
I'm still very surprised you have to write a paper check for rent. Your landlord doesn't have online banking? Even if you have to use your bank's online bill pay feature, they will issue and send the paper check for you if your landlord doesn't accept online transfers. For me, my rental management company has online payments, my daycare uses bill pay, everyone else is online or what not, except for some child development classes I'm taking at the local college, which still require paper checks for tuition.
I've heard Zelle is supposed to be some consortium and may be better, but it is still twenty years late and hardly ubiquitous.