plural feedbacks?

Yes, "feedbacks" can be used as the plural form of "feedback." However, it's important to note that while "feedbacks" is technically correct, it's not as commonly used as the singular form or the uncountable form of "feedback." In most cases, it's more common to use "feedback" as an uncountable noun or to refer to multiple instances of feedback using phrases like "pieces of feedback" or "instances of feedback."

feedback is countable noun?

Yes, "feedback" is a countable noun. It refers to the responses or reactions to a particular activity or situation, and it can be pluralized to refer to multiple instances of feedback. For example, "I received a lot of feedback on my presentation" or "The feedback from our customers was overwhelmingly positive."