Stop in for a cup of coffee

I am looking for a buck boost transformer like that. One that goes over 100 percent, to buck up low voltage...
View attachment 1715456612
There are options out there. This might be a place to start..

https://www.amazon.com/Beleeb-Variable-Voltage-Regulator-Transformer/dp/B07JV8ZCG8/?tag=fabo03-20