For me yes

It is possible. First, FCL.305(a)(1) states that a CPL holder may exercise all the privileges of a LAPL or PPL holder. MED.030(c)(2) states that when exercising the privileges of a PPL, you should have at least a class 2 medical certificate.

Then, FCL.915.FI(b)(2) states that an FI which is a PPL holder is restricted to train for the LAPL unless (s)he has passed the CPL theoretical knowledge examination – which (s)he has in the case you mention.

MED.A.030 Medical certificates
Regulation (EU) 2020/359
(a) A student pilot shall not fly solo unless that student pilot holds a medical certificate, as required for the relevant licence.
(b) An applicant for a licence, in accordance with Annex I (Part-FCL), shall hold a medical certificate issued in accordance with this Annex (Part-MED) and appropriate to the licence privileges applied for.
(c) When exercising the privileges of a:
(1) light aircraft pilot licence (LAPL), a balloon pilot licence (BPL) issued in accordance with Annex III (Part-BFCL) to Commission Regulation (EU) 2018/395, or a sailplane pilot licence (SPL) issued in accordance with Annex III (Part-SFCL) to Commission Implementing Regulation (EU) 2018/1976, the pilot shall hold at least a valid LAPL medical certificate;
(2) private pilot licence (PPL), the pilot shall hold at least a valid class 2 medical certificate;
(3) BPL for the purpose of:
(i) commercial passenger ballooning, the pilot shall hold at least a valid class 2 medical certificate;
(ii) commercial operation other than commercial passenger ballooning, with more than 4 persons on board the aircraft, the pilot shall hold at least a valid class 2 medical certificate;
(4) SPL for the purpose of commercial sailplane operations other than those specified in Article 3(2) of Commission Implementing Regulation (EU) 2018/1976, the pilot shall hold at least a valid class 2 medical certificate;
(5) a commercial pilot licence (CPL), a multi-crew pilot licence (MPL) or an airline transport pilot licence (ATPL), the pilot shall hold a valid class 1 medical certificate.
(d) If a night rating is added to a PPL or LAPL, the licence holder shall be colour safe.
(e) If an instrument rating or en route instrument rating is added to a PPL, the licence holder shall undertake pure tone audiometry examinations in accordance with the periodicity and the standard required for class 1 medical certificate holders.
(f) A licence holder shall not at any time hold more than one medical certificate issued in accordance with this Annex (Part-MED).

If you are a CPL holder, your privileges include those of a PPL. These include the right to give remunerated instruction for the PPL if you hold an FI certificate.

To exercise PPL privileges, you must have a valid Part-MED Class 2 certificate.

Hello all,
Thank you very much for all your help! I think now I am clarified :)

As PPL/FI you are allowed to accept payment for flight instruction. See FCL.205.A(b).

Correct, Lars-Henrik!!