I am not sure, my exchange may require 10 or more confirmations.  I've just glued to the PC waiting.

Pretty much what ranochigo said.

But just to add if you're wondering, Bitcoin isn't slow for no reason. It's slow to remain as secure and as decentralized as possible. If you want something cheap and almost instant, you can always transact using the typical payment rails or probably use the typical centralized cryptocurrencies.

Which exchange did you use so 9 confirmations have not been revealed. Indeed there are some exchanges that charge more than 10 confirmations even up to 20 confirmations. I found this when I made a deposit on the Bibox exchange.

if you still haven't received a notification, immediately use the support service to the party concerned, so they can recheck the transaction you made.

Which wallet is that? Using noncustododial wallet like Electrum and all other noncustodial wallets I have used takes only 1 confirmation. Even Electrum can be able to spend unconfirmed transactions if enabled. On noncustododial wallet, you will have the full control, only 1 confirmation is enough. Even, on the centralized exchanges, the exchange service would have gotten the coin after 1 confirmation, but they programmed it according to their terms of service in a way someone (not having full control which are all centralized exchange users) will not be able to fraud by withdrawing immediately after deposit is having only 1 confirmation. Recently, many exchanges has taken their deposit to 1 confirmation while the withdrawal after the Bitcoin deposited have 2 confirmations, or more confirmations.

I was surprised cause I have never seen a situation where a transaction to no custodial wallet requires 6 confirmation cause a single confirmation is always enough while the centralized exchange confirmation defers but most exchanges require 2-3 confirmation before the BTC can be withdrawn or available for sell.

If you deposited into an address for Bitcoin/BTC and not an altcoin named "Bitcoin whatever", I find rather strange the high number of confirmations asked. (Anything higher than 6 is too high for Bitcoin).
I suggest you double check what you were meant to deposit there, also maybe share the name of that exchange so people around here can cross check. I hope that I'm wrong, but something smells fishy...

Most of the service company only needed 1 confirmation and some needed up 3 confirmation . why you need more than that . even at 1 confirmation you are already able to move your coin anywhere. I have never deposited a service and asked for more than 6 confirmation. and now all on average requirement only 1-3 confirmations for bitcoin.

Why would you need 9 confirmations though?

Only 1 is enough in most cases. Most exchanges accept 2 or 3 confirmations. You are still waiting for what? To get the 10th confirmation? What good will it do?

No offense but I don't think you understand how bitcoin works.

Actually, I don't have big difficulties in my transactions in Binance exchange. I can make my transactions faster than before now. And of course, the decreasing number of people who make transactions on the network helped this also. I don't know which exchange you use. But I'd advise you to use Binance.