We have a router in our home but the signal does not reach our backyard birdhouse. We bought a AX1800, but it appears to be a router and not a wifi extender. What would be a better choicw?

My range extender has Model: RE223BE and BE3200 W-Fi 7 Range extender on the label It was working fine with my birdhouse cameras until it stopped providing the 2.4GZ signal they need. The 2.4G light i