drywall patch

I am new to this forum and a very basic DIYer. I don’t really have texture on my wall, it is just the basic texture that you get on any painted wall like in the 1st pic below. I removed chair rail from one of my bathrooms and sanded and did mudding to smooth out the wall. Unfortunately the texture of the striped area has a very plain surface whereas the original wall has the slightest texture that you get on any painted wall . All the videos I saw ask to use a large drywall and tape and mud but if I mud it then will I not end up having a very smooth wall like picture 2 below?
can someone please help??

 

The top pic has enough layers of paint on it that it looks like orange peel to me, which is a sprayed on texture. Regardless if it is textured or not, if you really want your repairs to blend in, you would likely need to rent a hopper, hose and air compressor and spray the entire wall with a light orange peel texture to make it all look consistent. Orange peel is achieved by thinning down joint compound with a little water to make it about the consistency of pancake batter... then then is sprayed on with a hopper, you dial the nozzle adjustment and to a very fine setting, which will be one of the smaller holes on the front dial.

That roller stipple is so heavy that I don't think you would be able to mimic the roller stipple even if you primed the repairs 3 or 4 times with a roller. That's why I'm suggesting you spray it w/orange peel.

 

Thanks so much for your response. I can assure you that is not orange peel. It has 2 coats of paint since it is a darker color. I would say 3 coats because the first coat was the builder painted white coat. I agree that the picture is taken so upclose that it almost looks like orange peel.
I have looked at the orange peel finest setting and it was still a lot of texture on the wall. I haven't tried priming it 2-3 times but that does sound like something that might work. Thanks!!

 

You kind of need to feather out the primer if you are going to try to recreate your stipple. Put it on heavy where the wall is smooth then take your roller as it is getting low on paint and roll out away from the repair to kind of feather that paint out to nothing. A thicker nap roller will help, at least 1/2" if not 3/4". Do that 3 or 4x. Lightly sand the wall with a sanding sponge between coats to knock off crap in thr paint... stuff like what I see in your 2 photos needs to be knocked off flat before you paint over it. Allow plenty of dry time between coats.

 

Two contributors, a heavy thick primer. I just picked up a gallon of Kills PVA primer and was pleased to see how heavy the material was compared to most PVA primers,

Patching my bathroom for painting and where I would normally do 2-3 coats of primer this look good after just one.

Also a very long nap roller helps add more texture! You can also get spray cans of texture material.