Almost all ESG ETFs are, more or less, greenwashed. The criteria for each ETF are different, but if you go for larger ETFs (total invested money AUM, more than 500 stocks), most probably you’ll have some companies in the ETF which you personally would not pick.
Some ESG ETFs still have tobacco companies in it, some are ok with nuclear stuff. It really depends.
I understand that you want to invest in sustainable assets, but you really need to check each ETF for yourself. ESG ETFs might also underperform traditional large ETFs.
On another note: where do you put companies like Roche, Novartis and Nestle (to stay with CH companies)? Are those sustainable and conscious for you? Some people might say yes, others wouldn’t buy it all.