It's a little different, RT-AX86 (A). It could be a Japan-only model. Here's the link for the one I just purchased and a page with several other Asus routers also with (A) suffixes (Japanese site, sorry).
The Merlin Wiki states support for the RT-AX86U and mentions "R" and "W" suffixed models but does not mention (A) suffixed models. Does anyone know if the RT-AX86U (A) model is supported? The specs are the same but I wonder if there's a component-level difference which could be problematic for...