How long it take for BlackRock ETF

I have doubt on how long it take for approval of BlackRock BTC ETF. My other doubt is that will SEC have problem of Coinbase as custodian for BlackRock ETF as SEC currently sue Coinbase and lawsuit is running. Actually this is main doubt for me. Or that case don’t effect because this is BTC ETF?

If not coinbase is it possible that BlackRock be self custodian for BTC ETF? And if SEC don’t have problem when ETF will be approved? And how long it take for trading to start after approval of the ETF? Do it take several months or not that much long?