Declining Survey Response Rates: Seeking Insights and Trends

Hi all! Over the last couple years, my team has noticed a decrease in response rates for surveys and it being harder to recruit customer research participants for topics. I'd be curious to know if others are seeing this trend? (For example 3 years ago we had a standard 5% customer response rate on surveys, this year it seems more like 2.5%, forcing us to send to larger samples) Edited for context: this is our own customers, B2B market