Hi @Spawn10 ,
Could you please share a bit more about your scenario?
Do you want to generate a xml data/file based on a data entry within your app?
If you want to generate a xml data/file based on a data entry within your app, I afraid that there is no way to achieve your needs in PowerApps currently.
There is no way or functions supported within PowerApps to convert a data entry into a xml data/file. If you would like this feature to be added in PowerApps, please consider submit an idea to PowerApps Ideas Forum:
https://powerusers.microsoft.com/t5/PowerApps-Ideas/idb-p/PowerAppsIdeas
As an alternative solution, you could consider generate a xml string within your app with related data from users, then pass the generated xml string value into a flow (Microsoft Flow), within the flow, you could use the genrated xml string value to create a xml file.
I have made a test on my side, please take a try with the following workaround:
Microsoft Flow's configuration as below:
Within the "Create file" action, you need to specify the parameters you want to pass from your app to this flow using the "Ask in PowerApps" dynamic content.
PowerApps app's configuration as below:
Set the OnSelect property of the "Fire Flow" button to following:
'20190613_case1'.Run("PowerAppsTest.xml", "<?xml version='1.0' ?><root><name>PowerApps</name><executor>Kris</executor></root>")
On your side, you need to create a connection to above flow within your app, then add a "Button" within your app, set the OnSelect property of the "Button" to following:
'YourFlowName'.Run(
"PowerAppsTest.xml", /* <-- Type your xml file name e.g. xxx.xml */
"<my:myFields xml:lang='en-US' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' >
<my:section_request_type>
<my:type>1</my:type>
</my:section_request_type>
<my:section_user_info>
<my:text_first_name>" & first_name.Text & " </my:text_first_name>
<my:text_middle_initial>" & middle_initial.Text & "</my:text_middle_initial>
<my:text_last_name>" & last_name.Text & "</my:text_last_name>
<my:text_nickname>" & nickname.Text & "</my:text_nickname>
<my:text_job_title></my:text_job_title>
</my:section_user_info>
<my:section_req>
<my_employee_status>" & Radio_Status.Selected.Value & "</my_employee_status>
<my:section_contract_term>
</my:section_req>
<my:section_requestors_info>
<my:text_requestors_name>" & requestors_name.Text & "</my:text_requestors_name>
<my:text_requestors_phone_number>" & phone_number.Text & "</my:text_requestors_phone_number>
<my:rtext_additional_comments>" & additional_comments.Text & "</my:rtext_additional_comments>
<my:text_manager>" & Dmanager.Text & "</my:text_manager>
</my:section_requestors_info>
</my:myFields>"
)
Note: Please replace the double quotes ("") within your generated xml string value with single quote ('').
More details about firing a flow from an app, please check the following article or video:
Start a flow from a canvas app
https://www.youtube.com/watch?v=1wl9AtxWdkg
When you press the "Fire Flow" button within your app, it would fire a flow, and pass the specified parameters to your flow. Within your flow, it would create a xml file based on passed xml file name and xml file string content. The flow would be executed as below:

Please take a try with above solution, then check if the issue is solved.
Best regards,