If you are meeting a provider for the first time and you have an issue where you have an erection but you are not able to maintain it , should you bring this up to the provider so you'll know if they can accept you as a client or not

Then go see a provider! If you're seeing a well reviewed experienced provider, chances are she's been with a client with the same problem. Using condoms can cause issues for guys who don't have ed problems and first encounters with escorts can cause issues, do to nerves. Good luck

can be problematical.
After the session has started there can be some discussion about that.

Any provider worthy of her profession will understand and do what she can to make the session enjoyable for you. that is what you are paying her for. Remember, she is being paid to please you, not the other way around.
In addition, you are not alone. This is something that a good provider has more then likely dealt with before.

It would also be a good idea to find a provider that is stimulating to your preferences and one that has enough experience to deal with you.

Right? That's what most say.  If I went to a provider and had a bad day and the shit is still on my mind and I can't relax or get in the mood.  Ohh well on my part. When the clock strikes "times up" doesn't matter if I've even taken off my shirt times up and that's it.  They don't care about your problems, they care that the correct amount is in the envelope!

But what counts is what happens during that time.
I will not paint the broad brush over providers about "not caring" about a hobbyist's problems.

The envelope...That goes without saying.

What acts can be made enjoyable or what acts should be best performed for those with ED issues if the hobbyist has ED problems?

My opinion would be NOT to discuss this before the date/session. Seems like some people are forgetting you arent supposed to discuss anything that leads to it being sex for money until after screening and you have meet and began the session. But most providers Im sure will not care. As long as after the session has began(meaning clothes off touching has began etc) you tell her what works best and tell her not to worry if you have issues. We are all doing this for the money obviously! alot of us (me included do REALLY enjoy the sex part as well. Its always nice to relieve stress LOL! but as long as you have passed screening, paid us, and are a nice gentlemen we will do whatever you want! LOL that is just my 2cents but dont worry about it. Just have fun relax and dont discuss anything that could incriminate YOU or HER!