In order to check if your HLS and/or DASH content complies with the respective requirements defined in its standard, there are tools available, which will help you to check that. Apple and the DASH Industry Forum (DASH-IF) accompanied these norms with conformance tools in order to help to check the validity of your content.
MPEG-DASH streams can be checked via the DASH IF Conformance tool by providing the MPD URL (.mpd) to it. You can just validate if your MPD is compliant, or it checks your content against the information provided in our manifest as well. Once finished, it provides you with a list of issues if there are any.
HLS streams can be tested using Apple's mediaStreamValidator. This command line tool will run a analysis of your content by downloading and probing the segments as well as if your playlist files are compliant with the HLS RFC. Once finished, it provides you with a list of issues if there are any. More details about it are available here.
This tool can be downloaded in the Apple Developer Area, (download and install the HTTP Live Streaming Tools). To do so, you would have to have a Apple Developer Account. mediaStreamValidator works on macOS only.
Both tools are helpful to detect common issues, which might prevent a successful playback of your stream. However, they don't guaranty that your stream will be playable in an optimal way within your environment as many other conditions and requirement have to be fulfilled in order to provide users with a good quality of experience.