Q
for most operators, the TO/GA initiation is just a means of starting the go around. Thereafter, dependent on the company SOPs there will be a reselection to other modes - e.g. at 1000' agl select FL CH and hit the THR switch (to reduce to CLB power). Some companies use V NAV in place of FL CH but the principle is the same.... get it going skyward, then, at a safe height, sort out the procedural bits. I don't know of anyone who uses TO/GA with no subsequent intervention but, even if they did, the aircraft would level at ALT capture and the power would come back to hold dialled IAS.