This is a button on a web page, so using Click UI element in window or Press button in window won't work. Click link in web page is also likely not to work. The correct action here is Press button in web page.
But you need to modify the selector as it currently contains the number of results, as @Srini007 correctly pointed out. Try modifying your selector to be as follows:
div[id="main_panel"] > div > a[class="hbtn btn-show-all action-toggle-reviews"]
Essentially using the class of the button, instead of the text inside it.
Alternatively, modify it to not expect an exact match (equals), but use a different operand, like "Contains" or "Starts with", and leave only a part of the text in for comparison, such as "Show all" instead of "Show all 54 reviews".
See here for reference on how to modify selectors: https://learn.microsoft.com/en-us/power-automate/desktop-flows/build-custom-selectors
Also this video: https://www.youtube.com/watch?v=2PcyBa22Jj8&ab_channel=Thomas%22Shaky%22Petersen
-------------------------------------------------------------------------
If I have answered your question, please mark it as the preferred solution. If you like my response, please give it a Thumbs Up.
I also provide paid consultancy and development services using Power Automate. If you're interested, DM me and we can discuss it.
