From everything I have read over the last few years, they're saying that Metoprolol ( and other beta blockers as well) shouldn't be the first line, single use medication to control high blood pressure ( though they may be used in patients with ischemic cardiac disease, heart failure, or arrhythmias) as they aren't as effective as the other drugs now used(listed in the article I linked) to control high blood pressure. The side effects of beta blockers ( including significant lowering of the heart rate) also precludes their use in many patients.

I take metoprolol tartrate for heart rate control primarily, and it's very effective in controlling my A-fib and other atrial tachycardias. I also have high blood pressure, and take losartan and chlorthalidone ( diuretic) specifically for blood pressure control, although the metoprolol also works to some degree with the other drugs to keep my blood pressure down.
https://www.verywellhealth.com/hypertension-drugs-1745989