What to do if there is a dot in the attribute name

[il77781]

Hello. actually, the whole problem has already been voiced in the title...
I have a device, some attributes of which contain a dot in the name:

These are, for example, "fan.on", "fan.fan_level", "fan.mode" and so on...
If I try to extract the value of this attribute using Javascript Templates,

type: custom:button-card
name: |
  [[[
    return states['fan.dmaker_p44_7a6c_fan'].attributes.fan.fan_level
  ]]]

nothing works!
Actually, the question is how to solve this problem...
Yes, of course, I, in general, solved it by creating helpers sensors (the template format of which allows you to use attribute names that have a dot in them), but it seems to me that this is not the right way...
Please tell me, is there any way to solve this when using Javascript Templates in Button Card?

[il77781]

In general, @RomRider gave a solution here:
al-one/hass-xiaomi-miot#1795 (comment)
Apparently, he just doesn't look here...
This solution works... With some oddities, but it works...