For some time now, the stores have been issuing stricter guidelines to protect themselves from possible streaming fraud. Among other things, more attention is paid to the fact that the music was clearly produced organically and, above all, that the tracks do not fall below a certain song length.
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In addition to the song length, your tracks should also have a clear start and end. This is also where a bit of "common sense" kicks in - tracks that seem to have the goal of merely achieving high streaming numbers without "added artistic value" no longer easily make it through the quality check and will continue to be increasingly checked and kept an eye on by the stores even after a possible release.
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Therefore we can only recommend you to make sure that your tracks correspond to regular song structures. Then the chances are definitely higher to be published.