Rectal cancer metastasis to bones first any information on this.

2022 44 yr old daughter diagnosed with rectal cancer. Rx- Radiation, chemo, robotic removal of cancer, temporary ostomy. 1 1/2 years later bone metastasis to right humorous. Rx- Radiation, chemo then partial shoulder replacement. This is so rare, typically goes to an organ. Anyone that this has happened to please share your experience. So nervous for her next scans. She is on her 3 round of chemo.
Thank you for your responses.
Scared Mom