Generally, ETFs do not declare dividends. The dividends received by the ETF from the underlying securities are reinvested. By reinvesting the NAV of the ETF will increase.
I am told that paying out dividends by ETF is not an ideal way of managing capital as this will result in retail investors needing to pay tax. Hence most of the ETF do reinvest the dividends received from their underlying stocks. If retail investors need money, she/he can always sell a portion of the units - of course, this will be subject to capital gains if any.
Last year a peculiar incident happened with SBI AMC who declared special dividends to give some cash out to EPFO under the Nifty 50 ETF.