WIFI Repeater with Raspberry Pi (B Model)

Installed OpenWRT (Ver. 21.02.1 r16325-88151b8303) on my raspberry B model.
I want to use the Raspberry as a WiFi Extender hence I installed the packages "relayd" and "luci-proto-relay" to add the bridge interface between lan and wlan. I can connect the access point and also set up the bridging Access point. When I connect the bridging Access point I can perform a ping with the Diagnostics menue:

PING openwrt.org ( 56 data bytes
64 bytes from seq=0 ttl=56 time=21.052 ms
64 bytes from seq=1 ttl=56 time=20.870 ms
64 bytes from seq=2 ttl=56 time=21.373 ms
64 bytes from seq=3 ttl=56 time=19.761 ms
64 bytes from seq=4 ttl=56 time=20.644 ms

Although the ping works, I do have no internet access.
Any idea what could be the reason.
Thanks for your help

From where ?

Hi frollic,
the raspi is connected to a WIFI hotspot (Access point) and apparently the ping Raspi --> Access point --> Internet works.
IP address is the openwrt one and can be accessed from the raspi

That didn't answer my question....

AFAIK, brcmfmac doesn't support concurrent AP and STA interfaces on the same radio, which would be required for a 'repeater' - not that the RPi would make a bearable wireless AP in the first place.