Hi @Audreyma
Please follow the instructions from @hugobernier . In addition, I would check the lighthouse tab under chrome developer tools. This will provide you clear insights into your entire site performance, accessibility, etc.. screenshot below

Also, Please note there is a high chance your power pages site might be in the Azure cold tier rather than the hot tier. Meaning, that if you do not use the site for a while behind the scene, the Azure web app will push the site builds to cold storage which will also cause a slow load initially.
NB: Please remove any adblockers, or third-party extensions from the browser if you have them.
Hope it helps.
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