Broker Selection and Withdrawal Experience with Prop Firm

Hello everyone, I'd like to share my experience and ask for some advice. I'm currently looking for a new Prop Firm after trading with my old one for a while. My main concern now is about selecting brokers that these Prop Firms use. Some firms look great in terms of conditions and fees, but when I check the brokers they partner with, they are often unfamiliar. I'm unsure about their liquidity and reliability, especially when it comes to withdrawals. I've had experiences with other firms where I had to wait a very long time or encountered many hidden fees, which was frustrating. Has anyone else experienced this? What criteria do you use to consider this issue, or should we directly ask the Prop Firm how long payouts typically take or if there are complex verification processes? After all, if we make a profit, we want to be able to withdraw the money, right?