Nobody's going to get an award in heaven for the doctrines they believed to be true while in the earth.
διδασκαλία
teaching, teachings, instruction,
doctrines
1 Timothy 4:6 (LEB) By teaching these things [the doctrines of Christ] to the brothers, you will be a good servant of Christ Jesus, trained in the words of the faith and of the good teaching that you have followed faithfully.
BTW, 1 Timothy 1:9-10 includes the opposition to sound doctrines with quite a list of other offenses (sins):
1. lawless
2. rebellious,
3. ungodly
4. sinners,
5. unholy
6. totally worldly,
7. one who kills his father
8. one who kills his mother,
9. murderers,
10. sexually immoral people,
11. homosexuals,
12. kidnappers,
13. liars,
14. perjurers,
15. whatever else is opposed to sound teaching,
As for rewards, Paul tells Timothy:
1 Timothy 4:16 Fix your attention on yourself and on your teaching. Continue in them, for by doing this you will save both yourself and those who hear you.
2 Timothy 4:3-8 For there will be a time when they will not put up with sound teaching, but in accordance with their own desires, they will accumulate for themselves teachers, because they have an insatiable curiosity, and they will turn away from the hearing of the truth [see John 10:28], but will turn to myths. But you, be self-controlled in all things, bear hardship patiently, do the work of an evangelist, fulfill your ministry. For I am already being poured out as a drink offering, and the time of my departure is imminent. I have fought the good fight, I have completed the race, I have kept the faith. Finally, the crown of righteousness is reserved for me, that the Lord, the righteous Judge, will award to me on that day, and not only to me, but also to all who have loved his appearing.
...[ Oh, ya. He also said this:]
2 Timothy 4:18 The Lord will rescue me from every evil deed, and will save me for his heavenly kingdom, to whom be the glory forever and ever. Amen.
"Save" =
σώσει sōsei
save; keep
verb, future, active, indicative, third person, singular