Thanks for getting back to me. I've got a couple of suggestions for you.
- Hard restart your console by holding down the power button until it turns off. Then, power it back on. Also, make sure that FC 26 is completely closed down.
- In game, go to the visual setting. Toggle performance mode. Also, turn hair strands and crowd quality to off and then back on. You can also try resetting the visual settings to default.
- On your Xbox, go to Settings > Devices & connection > Blue-ray > Persistent storage and hit clear.
Let me know if any of these help or not.