2 providers bill in MXN, listed alphabetically. They are Neubox and omg.lol. Split across shared hosting, vanity hosting and Domains and DNS, across 1 country. 51 records do not record this field, and cannot appear here either way.
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NeuboxMexican registrar and host since 2004, one of the larger .MX registrars, selling cPanel hosting in pesos with OXXO Pay at checkout.
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omg.lolA personal internet address bundling a profile page, email forwarding and a handful of small web tools for one flat yearly price.
Who is the best host that bills in MXN?
Hard to say without knowing the project. A free tier matters for a side project and barely at all for a shop that loses money every minute it is down. Read a few records side by side; the guide says where to start.