I would like to know if the phrase: "Filter updates" means "updates of filters" or "updates of 1 filter". So can this phrase "Filter updates" be used in plural meaning, so to say? Instead of saying "updates of filters".
The term filter in the phrase filter updates is known as an adjectival noun or attributive noun. These are ordinary common nouns that are used as adjectives.
In general, attributive nouns are singular. In your example, filter updates means updates relating to or on filters. The term updates is plural in the example given, so it suggests there is more than one update, either multiples for a single filter or one or more updates to more than one filter.
Whether the updates affect a single filter or multiple filters, the term filter would remain singular, since it is used as an adjective and adjectives do not usually change form regardless of the number of the nouns they modify. In English (unlike many highly declined languages), we say large boats not larges boats.