Short answer: yes. If something in your finished gallery bothers you, you can ask your wedding photographer to take another look at it. The key is knowing what you are actually asking for, because a small tweak and a full Photoshop job are two different things, and your photographer will want to know which one you mean.
What is the difference between editing and retouching?
Editing is the global work done across your whole gallery: cropping, straightening, colour and exposure, so the set feels consistent from start to finish. Retouching is local, detailed work on a single image with software like Photoshop: removing a fire alarm from the wall behind your ceremony, cutting glare off glasses, tidying a stray hair across a face. Because it is detailed, per-image work, check what your own photographer includes in the standard edit before you need it.
What counts as a reasonable request?
Small, specific fixes are the natural ones. An exit sign in the background of your ceremony wide shot. A visible bra strap in an otherwise perfect photo. A spot on a chin in a close-up you want to print big. Requests that change how a person actually looks are a different matter. Your photos are a record of a real day: wind in the hair, creases from hugging, confetti caught in the veil. If you are thinking about that kind of change, ask your photographer about their approach to appearance-changing requests first, so you know where they stand.
How should you ask?
Be specific. "I don't love the photos" gives your photographer nothing to work with. "Can you take the exit sign out of the ceremony wide shot?" does. Go through your gallery, note the exact photos and the exact change for each, and send them in one batch rather than a drip of emails. If your gallery system lets you favourite photos into a list, use it. Be direct and be kind about it, and give them the chance to put it right.
Will extra retouching cost more?
It depends on the photographer, so ask about it before you need it. Detailed retouching can be extra depending on the request and your agreement: your photographer might include a set number of requests, or quote per photo from the start. Asking for different versions of delivered photos, like a colour copy of a black and white image, can count as extra work too. None of this is a reason not to ask. It is a reason to ask clearly, so you both know what is involved before the work starts.
When should you raise it?
Sooner is better. Check your contract or the email that came with your gallery for a request window, in case your photographer sets a period after delivery for retouching requests. It is also worth living with the gallery for a few days before you send your list. Photos grow on you, and the thing that bothered you at first look can stop mattering by the end of the week. When you are sure, send everything in one go.
If you are still planning your day and want a photographer who is happy to talk openly about all of this before you book, drop me a message.