Okay
Here’s some info for other possibilities check first.
https://www.getdroidtips.com/guide-to-fix-vivo-power-button-not-working-problem/
IfIXIT doesn’t seem to have a guide on this model currently . It’s a about a 6/10 difficulty I’d say. Easy if you take your time .
The switch Under the button is the likely issue. Not the button itself.
Here’s a replacement switch cheapest I could find. You can look it up on other sites. Just check it’s the same one.
https://www.aliexpress.com/item/1005003888431855.html?spm=a2g0n.productlist.0.0.3de334aaNM4YPq&browser_id=c428b15bd0444cc59a4aa9b33efcc34e&aff_trace_key=f63517d16aa94f2bb3389f68ca99fe4a-1724833943694-02531-UneMJZVf&aff_platform=msite&m_page_id=vgzuhafvwcauvpqh191b2df61e7670ed79d5bbb17a&gclid=&pdp_npi=4%40dis%21GBP%212.47%212.10%21%21%213.15%212.68%21%4021039c5917252828697171171e1bd7%2112000027397399390%21sea%21UK%210%21ABX&algo_pvid=d88a1dd1-e71e-405a-9d11-ab3104ef4a71&_universallink=1&m_page_id=vgzuhafvwcauvpqh191b2df61e7670ed79d5bbb17a
Here’s a guide play it slow a few times to get the idea. It’s pretty easy if you take your time.
https://youtu.be/diPz_m5H7lI?si=n_X5qUui_tgjn_WB