This is incorrect. Note that governments around the world are also experiencing record levels of inflation and each has their own fiscal policy.
Inflation is an aggregate economic effect driven by a variety of factors—including but by no means limited to government spending. Other things that contribute to inflation:
1. Supply shortages
2. Cost of living
3. Abundance of capital (low interest rates, high wages, etc)
4. Speculation
Basically anything that contributes to groups of people assigning a higher value to the same set of goods or services.
Supply is the most immediately noticeable cause and COVID has disrupted supply chains for some time. It is entirely unsurprising we've seen inflation as a result. Government policy has certainly played a part, but blaming everything on government spending is misleading in that ignores the larger realities of inflation beyond the borders of any nation state.
Given that we base inflation numbers on CPI, inflation exactly is companies raising prices -- well, companies that produce the goods that are included in CPI, anyway.
Yes, we still have to consider the reasoning behind why they are raising prices. Personally, I believe it is more because of supply chain shortages than COVID fiscal policy (though the latter certainly contributes), but I agree that's up for debate.
Why?
Going by what I see as an individual, there are lots of things happening around me that drive prices up that don't have any strong relationship to my government's policy (e.g. bird flu raising poultry prices). I also don't understand how this can be the case simultaneously across multiple governments around the world.