It really does not matter that much. They are more like free variants.
For learners, there are probably many aspects of pronunciation needing attention that are much more important than this.
On forvo.com you can hear people from different places pronounce a word, eg. https://forvo.com/word/冰/#zh. There happen to be two speakers from mainland China and two ...
You may try Chinese Wiktionary and English Wiktionary, each has its own merits.
When searching for the pronunciation of a specific dialect word (since it may not be listed in Wiktionary) you can try 现代汉语方言大词典 of 古音小镜: