Highchair/booster seat??

So what comes next after highchair before obviously being able to sit at regular dining room chair lol. My daughter is only 19mos and I still have her in highchair. Baby #2 is coming in a few weeks. I know I won’t need the highchair for that baby for a few months. But when that time comes what’s the next step for my daughter? I don’t want to buy a 2nd highchair. Anyone have any recommendations for what they did with kids close in age like this for seating arrangements?

Thanks!