Yeah of course. First thing I did was look up the expedite process. There are things like financial hardship, humanitarian reasons and so on. When you find the reason that best fits your situation, that's when you start the process. A very important aspect is that you must show how the situation is affecting the US citizen. If the person immigrating is in danger or having issues, its much more difficult to get approved sadly. You can still do it, its just harder. So write the expedite request from the point of view that it will help the US citizen petitioner if you can.
First you gotta get evidence, being thorough as possible pays off here. For example, when I wrote my expedite request it was on the basis of humanitarian need, financial need and medical need.
I wrote about how my wife's absence made it difficult for me to make money by showing how I had to spend extra for childcare and how It made further education impossible until she returned. The evidence I used was bank account statements, receipts for services for my children and the schedule of the services they received to showcase the magnitude of cost and prove that there was significant cost to my wife being away.
My humanitarian section focused on Myanmar and my wife specifically. I talked about how much danger she was in everyday she remained. I used her ethnic minority id as evidence of danger, sent pictures showing bombings that had happened at her apartment complex, news articles and the US travel advisory pdf as evidence here.
For the medical need, I focused on how my disabled kids were being affected by her absence. I used their medical diagnoses, service calendar, schedule, and letters from all of their providers affirming that their mother returning would make accessing care easier for them and that they would benefit from her return.
I looked up successful expedite petitions and used their letters as templates for it. I would have sentences like "My wife's absence represents hardship for my family, we cant access necessary services very easily (exhibit a, b)." I then put the evidence in a table of contents on the final page and made sure that they were marked correctly, if I called it exhibit a, id mark it as " exhibit a (receipts of service)."
When I was finished writing it I contacted my representative to ask for help. Their office thankfully agreed to help after I explained the situation. I then sent them a copy of my expedite request and had them help me submit it alongside anything they could send to help me as well. I saved the evidence as combined pdfs since you cant upload more than 5 files on the immigration website. I then called the representatives office every few days to ask if they'd heard anything. My thought was that I had to be persistently annoying to get anyone to help me so I just bugged them all the time.
You can also submit it yourself by using the inquiry form on the USCIS site but getting all the extra help I could was important for me.
My expedite was approved after about a month of waiting. It sped the process up considerably despite me screwing up at the last hurdle when my lawyer didnt inform us that we were missing an important document to submit before our interview could take place (it ended up taking 3 weeks to get it and i uploaded it but didnt click submit at the bottom of the immigration site, waited 2 weeks with them telling me they didnt have it until i checked and realized i didnt click submit). I hope this helps. If it didnt, feel free to ask specifics and ill do my best to point you towards the right direction.